Similar case 25 odd years ago, two guys, also in a Baron. On the way North they flew into Cairns and the pilot walked into a local flying school wanting a Baron endorsement, which raised some eye brows.
Whilst refueling one guy had a slab of coldies and cracked a few on the tarmac. By that stage the Feds were watching.........
They got jumped at Bamaga on their return. The Feds named them "Dumb and Dumber".