Representing the Gold Coast here.
Not really too sure about venues, I'm not that familiar with these sorts of things especially since I've only lived here 2 1/2 years, but I was thinking maybe one of the theme parks here could be used? Like Movie World, for example, or maybe even Dreamworld or Seaworld. Other than that all I can think of is a beach gig in Surfers Paradise. I know it's possible, they have schoolies parties there every November.