If you want to head south, Try Danjera or Flat rock dams out the back of Nowra they have both been stocked with bass in past years and fish reasonably well in the warmer months. as for around Sydney, as others have said, The Nepean anywhere from Menangle north also try the top end of The Georges river you might be surprised what is actually in there. I love fishing out of my Yak that much I've got to the stage I'm thinking about selling my boat. Then again that would be one less toy and that just isn't allowed.
Cheers
Paul