The group has since been constructing a boardwalk to protect the grove's ecological integrity, enhance visitor safety and access, and support the local economy of Port Renfrew and the Pacheedaht First Nation people. The boardwalk and accompanying hikers trail is expected to be completed this year.
Asked whether his project was named before or after the popular 2009 science fiction movie, Watt laughs, and says the area needed a catchier name than just the cutblock number.
"The area is largely untouched and with such amazing old giant trees that were in danger of being cut down, the name Avatar seemed to fit well."
It is hard to deny that fact, as our group walks among the monumental red cedars, hemlocks, amabilis and douglas firs. The next tree we come across is a gnarled giant that would not be out of place on an alien planet. Its trunk resembles the mottled tubes of a pipe organ and is so tall its upper reaches can barely be seen.
Some of the trees are of such magnificent proportions it is easy see why comparisons are often made with the majestic Californian red woods. One tree, known as the San Juan Spruce, is 62.5m tall with a diameter of 3.7m. The world's largest Douglas fir is also in the area. The red creek fir measures 73.8m high with a 4.2m diameter. Watt has started a company called Big Tree Tours and leads guided hikes to Avatar Grove and the other record-sized trees around Port Renfrew.
"My hope is that the Avatar Grove helps to educate the public about the importance of protecting endangered old-growth forests on other parts of Vancouver Island, like the nearby Walbran Valley and how doing so can not only benefit the environment but the local economy as well," Watt says.
Asked about the substantial contents of his backpack when the trees are barely 10-15 minutes from the road, Watt says it is mostly emergency gear, food, water and first-aid equipment. "In case anyone gets hurt, you never know. Plus, this a wilderness area. You can still get cougars and bears."
During our group's hour or so in the grove, no such critters cross our path, but to prove his point Watt says he plans to check a nearby "bear-cam" he set up to see if it has had any large furry visitors.
Also joining our group for the day is Toni Chalk, another young Canadian committed to preserving the local forest areas.
Chalk owns Rainforest Tours, a company that takes guided day-hiking excursions to some of the local sites of scenic beauty. Earlier that day she had taken us to the suitably named Mystic Beach - a beautiful and wild spot that was still shrouded in early morning mist on our arrival. Its remote, unspoilt location attracted US draft dodgers in the 1960s but now it is more popular with hikers and surfers.
The 45-minute walk from the carpark takes us through another heavily wooded area, but this time the trees are all second-generation growth, with little that would be more than 100 years old. Not far from the road she stops to point out three massive tree stumps that would easily be a couple of metres across.
"You can see up there the size of some of the trees that loggers took out of this area", says Chalk, "but thankfully all this is now part of the Juan de Fuca Provincial Park, so what remains will hopefully be here for some time to come."
The old-growth forests of Vancouver Island are important for sustaining endangered species, climate stability, tourism and clean water, says Chalk. She says many First Nations tribes use naturally falling old-growth red cedars to build canoes, longhouses and other cultural items.
The largest strand of old-growth trees lies just further north of us in a 500ha section of land known as the Central Walbran Valley.
It is for these areas that Port Renfrew has the reputation as the tall tree capital of Canada.
Later that day our group returns for a tasty dinner at the Renfrew Pub, a stone's throw away from the Wild Renfrew - a small eco-resort featuring 11 well-equipped cottages beside the harbour inlet of Snuggery Cove. The cottages are warm and comfortable - exactly what is needed after a damp day's hiking.
After our meal we talk to one of the Pub's owners, Ian Laing, one of four partners who also own the Wild Renfrew resort, The Coastal Cafe, West Coast Trail Lodge and 180ha of surrounding land.
Laing says Port Renfrew used to be solely the domain of loggers and fishermen, but that is changing.
"The whole area is converting from using up primary resources to eco-tourism," he says, adding that as well as hiking and surfing, the region has some impressive mountain bike trails and a growing kite-surfing community in the harbour.
He says recreational fishing is also still a big drawcard with some big catches of salmon and halibut.
Laing believes Port Renfrew - less than two-hour's drive from Victoria, Vancouver Island's biggest city - is well placed as a small, unspoilt gateway to the area and that significantly greater numbers of visitors can be expected to visit if more old-growth forest can be protected.
The best of Vancouver Island
Voted by Travel + Leisure magazine as the number one island in US and Canada in their 2015 World's Best Awards, this is a destination worthy of more than just a one-day trip.
• Get cultured
On a small island just north of Vancouver Island, the oldest trace of human life in North America can be found - sets of footprints preserved in clay more than 13,000 years ago. The area is rich in First Nations' history - visit Victoria's Royal BC Museum to learn about early settlement along the coastlines, river valleys, rainforest and off-shore islands; then see how life changed with the arrival of European settlers.
First Nations' attractions can also be found in Duncan, Chemainus, Campbell River, Quadra Island, Yuquot, Tofino, Alert Bay, Fort Rupert and Port Alberni.
• Follow the trail
As you'd expect from a Canadian destination, Vancouver Island is a haven for outdoorsy folk. Walkers are particularly well catered for, with everything from short hikes (one to two hours) to multi-day trails. The Wild Pacific Trail is probably the best known - and often voted as one of the world's top hikes. Situated in the Pacific Rim National Park Reserve on the southwest coast, the trail spans more than 75km of coastline, cliffs, beaches, forests, rivers and streams. It's a tough track and hikers need to be well prepared - some river crossings require cable cars or ferries; at other times you'll need to wade your way to the opposite bank.
A shorter, yet still challenging, option is the Juan de Fuca Marine Trail - a 47km trek along rugged coastline that can be tackled as day walks, or over four to six days.
• See the natural sights
Marine life is abundant in British Columbia's waters, with whales, sea lions, otters, dolphins and porpoises all found in the wild. Whale-watching trips are available, as well as kayaking and canoeing tours.
This being Canada, salmon fishing is a drawcard - book a charter or stay at one of the many resorts dedicated to landing you the big one.
Tofino, on the northern tip of the island, is Canada's surf capital, with 35km of surfable beach breaks. Try Cox Bay, Chesterman Beach and Long Beach, within the Pacific Rim National Park Reserve but make sure you bring a wetsuit - the water is a constant chilly 10C .
Back on land, don't miss the Butchart Gardens, started more than a century ago by chemist Jennie Butchart and now one of the world's top floral show gardens.
• Eat and drink
Home to a growing number of organic farms and vineyards, Cowichan Valley is a must-visit for foodies and wine buffs. Speciality produce includes sea salt, honey, cheese, vinegars and, of course, maple syrup. Wash all that down with local wines, ciders, craft beers and coffee. A good place to start is one of Cowichan's six farmers' markets, the largest of which is the Duncan Farmers' Market, every Saturday.
Victoria, British Columbia's capital, has some excellent eateries - earlier this year Vogue.com recommended its favourite hotspots, including bakery Fol Epi, speakeasy-inspired Little Jumbo and tapas joint Perro Negro. For a special occasion, high tea at the Fairmont Empress can't be beaten.
CHECKLIST
Getting there
Air New Zealand flies direct from Auckland to Vancouver, with one-way Economy Class sale fares starting from $749 (sale ends September 26).
Details
For information on efforts to preserve the forests, or to arrange visits, go to ancientforestalliance.org, bigtreetours.ca or rainforesttours.ca.
Online
See: hellobc.com
