there's a bloke in the 'van park with a neat trayback camper and plate boat that seemed to have a few fishing clues - he's not from Weipa but spends a lot of time there-mate quizzed him at length on the trayback camper as he aspires to build one himself. I suspect he'd share some tips, as he was quite chatty with us.
That newsagent in Weipa, and the other fishing and camping store would know what is popular and effective up there. Either or both would be worth a call. The newsagent in particular had some very high end gear including some very flash fly gear down to the more usual stuff