The image he conjures of carefree childhood springs to life as his mokopuna run up, one bearing a 2ltr milk bottle half-full of a lurid red drink. It's too much of a burden for the adventures the boys have in mind, so it's handed to him for safekeeping before they hare off.
"Sometimes I feel really sorry for my grandchildren," he says. "They miss out on so much of what we had when we were kids."
Hotu is the advance guard of a tourism venture with a difference. Under the rubric Tamaki Hikoi, it offers visitors a chance to see the city through the eyes of the tangata whenua, Ngati Whatua o Orakei. A few months ago, I'd followed him on a walk across the flanks of Maungawhau, the volcanic cone that Pakeha called Mt Eden, and I was keen to catch up with him again when I heard they had started this walk, the Whenua Rangatira (Land of the Chiefs).
Bastion Point, which the Maori called Takaparawhau, is a resonant name for many Aucklanders: it was the site of the raid in May 1978 in which 800 police, reinforced by the army, destroyed the encampment of a peaceful occupation that had lasted for 507 days. More than 200 people, protesting Government plans to sell the land for flash housing developments, were arrested.
The event was a watershed moment in the modern history of Maori land protest, but for the iwi, it was a deja vu that amounted to a double insult: the land they were being evicted from was the same land they had been exiled to in 1951, when the National Government of Sid Holland had ordered the destruction of their settlement down on the flat at Okahu Bay, torching shacks that had been derided as eyesores.
Worse, they were now tenants. Their new home was land taken under the Public Works Act in the 1880s and would not be returned until the Fourth Labour Government formally apologised and returned it.
Yet anyone expecting Hotu's hikoi to be a long catalogue of rage and resentment is in for a surprise. When I ask him how real the pain of '78 was for him - he was 26 then, he's 60 now - he replies slowly: "The great thing about getting older is that you get to see how things work."
It's an interesting choice of words, one that might be interpreted as either cynical or resigned. But the way he talks, it sounds like a man who has lost the uncompromising hot-bloodedness of youth. He talks of the protest leader "Uncle Joe" Hawke, and the Oxbridge-educated paramount chief of Ngati Whatua, the late Sir Hugh Kawharu - firebrand and moderate - who "walked on opposite sides of the path and ended up walking together".
As we walk across the headland, Hotu speaks softly of past and present, taking me through gardens and tree nurseries and past the meeting house, Tumutumuwhenua with its ornate black sea eagle on the front. When he finishes with a karakia and a farewell, the place looks different somehow, as though his words have changed it before my eyes.
