Nathan's right about CF. It's not great, but OK as somewhere to go for a ride that is not too far away, tho I am keen to try Yass sometime too.
CF has an MX track, very dry and dusty, very bumpy and the jumps are all doubles, which I avoid like the plague. The outer track is fastish and OK but no more than 1 km long. There are a collection of trails that can be ridden also, though all quite short. It's alwasy pretty busy too, tho early Sunday AM, or Sat PM, is not too bad. By lunchtime Sunday it's time to go home...
I use CF as a place to run in engines, or just get some seat time. That said, I don't get there all that often. It's $20 to ride all day.
We should try to organise a ride there or at Yass sometime, maybe when everyone has a bike that's going!