Brissy Waters is a brilliant place to fish mate, I love the area....
I can't remember the exact amount, but I've caught somewhere around 35 different species in there myself.
Without knowing exactly where you'll be saying it's hard to say what you're likely to catch, but the good old prawn will work wonders in there on just about every spieces.
Don't be afraid to use some breed either, not just brilliant for burley, but also an underrated bait.......
Good luck and enjoy the weekend mate....