There's a newish track at Windsor (about 50mins from Ryde) where it's Indoor, proper track, 20Ft driver stand, pit lane, plently of power, tables and chairs, canteen and a hobby shop on site. They race only on Monday and Friday nights but every other time the track is open to the public. $10 will get you about 4 hours track time. It's the best track by far in Sydney. No Nitro allowed though
http://www.auswidehobbies.com.au