Academy award-winning director Sir Peter Jackson, of Wellington, and stars including Orlando Bloom, Martin Freeman, James Nesbitt, Mikael Persbrandt and Sir Ian McKellen were among 450 cast and crew who arrived early and filmed for three days on the remote Arcadia Station, 66km from Queenstown.
The main unit continued its national tour of personnel and equipment in about 200 trucks on Wednesday to its next location shoot in Te Anau.
Mr Serkis was seen in Arrowtown on Wednesday night.
Parties were asked to sign confidentiality agreements, but it was common knowledge some residents in Glenorchy were employed to plant greenery on the set, Glenorchy School pupils were allowed to visit the set and the township's cafes did a brisk trade.
Business operators and staff enjoyed spotting the stars as they patronised cafes, bars, restaurants, hotels and Reading Cinemas in Queenstown.
"During a time that's traditionally quiet, it's great to have the boost of these crews in town spending up," Mr Jennings said.
Sir Peter and family shopped in Steamer Wharf, enjoyed a Shotover Jet boat ride and travelled on the Skyline Gondola during their time in Queenstown.
"I've been up the luge which I've always done and our kids have loved since they were tiny," he told the Otago Daily Times on Tuesday. "When I was up there I finally decided to paraglide down, which is what I've always wanted to do, and I thought 'Now's as good a time as any.' I absolutely loved that."
Sir Peter said while a core creative group was touring the locations to film, the film-makers hired many residents wherever they filmed.
"We had the weekend off and walking around Queenstown, just going shopping, I'm banging into crew the whole time, so you sort of get the feeling we've taken over Queenstown.
"The funniest thing that happened down here was I was walking around the [Queenstown] mall and a lot of people were asking for photos and stuff, which was fine, and then this young backpacker type guy comes up to me says, 'Ah, are you Peter Jackson? Oh my God, you're Peter Jackson, aren't you?
'"I say yeah and he says 'Ah, I've only got one question I want to ask you.' I said 'Sure, fire away.' He says, 'When's Avatar 2 coming out?' And I said 'In about three years.' He said 'Oh cool, mate, thanks!' and he walked away a happy man. That was good, always pleased to help anybody I can."