A generous serve of Aussie music combined with a dash of sunshine has proved the perfect recipe for Sydney's Homebake music festival.
The Divinyls, Missy Higgins, Operator Please, Paul Kelly and Architecture In Helsinki attracted about 20,000 concert-goers to the Domain.
The Greens were out in force campaigning against the use of drug sniffer dogs at Homebake.
But police said they had made at least 29 mostly drug-related arrests and issued court notices to 40 people for possession of drugs including cocaine, ecstasy, cannabis and LSD.
Two people had been charged with supplying a prohibited drug, police said.
NSW Greens MP Lee Rhiannon complained that government resources should be redirected to catching the "Mr Bigs" of the drug world.
"It's the big drug manufacturers and dealers who need sniffing out, not young people stepping out to enjoy a day of music with their friends," she said in a statement.
ARIA award winners Operator Please played the festival for the first time with the Gold Coast band's teenage members overcoming early nerves to finish an energetic set to screaming applause.
"It's exciting, I find it such an adrenalin rush," bassist Ash McConnell told AAP after the show.
Vocalist Amandah Wilkinson said it was overwhelming to play alongside some of her favourite bands.
"It never ever sinks in," she said.
Architecture In Helsinki vocalist and musician Kellie Sutherland said Homebake was very special to her.
"I grew up in Sydney, Homebake was the first festival I went to. I feel happy to be playing again," she said.
Something For Kate lead singer Paul Dempsey, playing a solo set, broke away from the day's line-up of electro acts.
Dempsey said he felt "a little sad" without his usual band members to keep him company on stage.
But he said he still enjoyed the vibe of summer music festivals.
"Outdoor festivals - you go along with your friends and have a day in the sun, see a bunch of bands, get sunburnt, drink too much, fall over," he said.
Australian music great Paul Kelly, who played Homebake in 2002 and 2006, said festivals were a good way to get around and see different bands.
"We have a bit of a festival set which is a bit different to what we do in our own show," he said.
