Go up tp Cairns, I did this 13 years ago in a Seminole, we went YMMB to Cooly on day one. Lotsa fun in Jupiters. Next Cooly to Airl Beach. Lotsa fun in backpacker bars... Then Airly to Cairns, even picked up a backpacker for a cost share to Cairns ie Box of beer ect.
Toured around FNQ for a week and flew back,Cairns to Archerfield, next day, inland for a bit then Bankstown, did a scenic jolly around Sydney city. Next day coastal back to Point Cook.
Trip of a lifetime, dont waste ya hours stooging around vic...Do it bro, good experience to.
Cosmo