G'day, I've only fished landbased around the pier in Lucinda. But have caught legal grunter(javelin fish), a 4 kg butter bream, wolf herring, and a few unstopables. A good place for bait is around the sugar pier with the cast net, or around smaller creeks at low tide.
Buy some crab pots also, plenty of muddies in the hinchinbrook channel, look for creeks and run offs feeding into main channel in the mangroves.
The fishing up there is unbelievable, just focus around the tide changes.
Also if you're there around the full moon the prawns should be running. Or black moon the fingermark will be on the shallow reefs, fresh squid for bait.
Cheers Leo