Williams praised the facilities at Arikikapakapa.
"I remember the course for its pure greens ... It's a good members' course," he said.
In a career spanning nearly four decades Williams caddied for several "high-profile players with huge expectations".
They included Woods and Australian Adam Scott.
Since retiring from the tour, partly to focus on his charity work, he says he "hasn't missed it one bit".
"It's nice to have a routine now.
"When you travel so much, you're always on a ticking clock," he said.
Williams had one major piece of advice:
"The criminal error that 99 per cent of weekend players make is that when they choose their club, they think they're going to hit it perfectly.
"So whatever club you choose, go one up - there's more room for error."
Don Blackledge, general manager at Rotorua Golf Club, said having Williams at the event was a boost for the club.
"I think it's great, the exposure it gives the club to the public of Rotorua ... There are people here who don't normally play, and part of the day's attraction is to get new members."
One of those infrequent players was Peter Faulkner, whose company was sponsoring a hole at the event.
He had modest aims for the day's golf.
"I'm just hoping to finish the day with the same ball as I started with."
