I know way around Comleroy, Wheelbarrow, Wheeny but there’s not much there. Better to go little bit further to Ourimbah for good mix of skill training. There’s a lovely track for training at Wheeny Creek but its only about 2hrs ride. Longer if take your time and play around, do every hill a few times to practice rock hopping. If you want longer open ride and still get some climbing practice, I recommend Ourimbah. All of these are close enough to Wiseman’s and North West Sydney.