Downboy said..
+ 1 for Maryborough
If not Granville in Maryborough, try the Boatworks on the Coomera river. I now use the Fishermans Marina travellift in Urangan for haul out, $350 in and out, $45 a day hard stand for a 33 footer. If you get a marina berth they are tolerant of discrete works on your boat. Like a total refit, but no mess.
I built two cats in Maryborough and know a top boat guy there who doesn't charge the earth if you need a hand.