Just a warning, driving at Menai legally requires having attending a cleanup within the 12 months previous as a member of an affiliated club, notifying the 4WD Association at least 8 days before hand, and submitting a trip report no later than 7 days after the trip. I was there weekend before last on a cleanup and we ran into two dirt bike coppers, they are starting to really crack down on it. Even if the land owners don't press trespass charges, the cops will go over and defect anything they can!
That said Menai is a fantastic training area. Sydney Jeep Club runs trips out there at least once a month for the cleanups, and while we don't have any formal training requirements or programs, one of our members is extremely knowledgeable of the area and a fantastic teacher. We had a bone stock ZJ with us the other week, including stock 27" road tyres, and with the right choice of lines he went almost everywhere the other vehicles did, and learnt a lot about his Jeep in the process.
I know there are those on here that think it's a waste of money, but I do highly recommend joining a club. There are a few Jeep specific clubs in NSW to choose from, I'm quite happy with the one I chose