Mate for good bass in the mountains you can't go past the nepean river. There are some great fish in there. I have a friend who consistently pulls out mid 50's cm fish. If you are using bait you can't go past live yabbies, that is what he uses and gets huge bass. If using lures use small fat divers, Sammy 65, cicada buzzers and pencils. I have had results on all of those.
Luc.