Neil,
There are basically 2 tracks. One east and one west. Track surface are similar. They are hard dusty surfaces. Best performing cars to date have been rear motor. Not many mid.
http://www.keilorrc.org.au/index.html
Knoxfield (Oconnor Rd) has a track too, but not a website (know as Knox RC).
Best to look at rctech site, then go to Au and you will find all the information you need