One of the best areas for offshore fishing is mooloolabah. Get yaself a chart and look for the reefs on the chart. Old woman island can be good and all the reefs around there. Will post u some basic GPS marks later 8) I would stick to the reefs but u may get a few macks or tuna in the bay there i'm not sure. Fresh bait is the go to.
Cheers, Lachie