Hi mate. There's heaps of reports on here with heaps of info in them from guys in the know. Plenty of spots and methods to try out if you do a search on the site.
We used to drift the eastern side of the island beside structure with a parachute out using lightly weighted 3inch nuclear chicken coloured wriggle tails. (Not gulps.. more berkley nemises or zmans). I really think colour isnt all that important anymore... within reason. It's more contrast and action. Here's a tip: Superglue the head onto the jig. Sometimes the snapper would pull it half off and not come back for a second bite if you didn't. Only seemed necessary over there. Go figure?
We did okay for a while but for us and this method it seemed to have died off a bit the last few years that we went there. Maybe the fish got educated. Chased the grassies over there for a while instead but haven't been back for a couple years now.
Research and time on the water will help big time.
Happy hunting.
Cheers
Gurn