Hey, I go to uni at Gatton, and can tell u that wivenhoe is around 45min drive, but u can only use electric motors. Summerset is around an hour or so, and can use any engine. You will need a stocked impoundment permit, cost $7 for the week, can get from fishing and camping store in gatton. as to the rest of ur query, have a look at the freshwater section.
cheers
BTW, around chrissy will be chockers up there