Nothing covers car damage.
A club gets CAMS affiliation by following the requirements set out by CAMS.
You need to have meetings, voted in members yada yada.
Here's the link to the club affiliation form.
http://www.cams.com.au/Forms/~/media...ON%20FORM.ashx
If you are certain you want to do timed events like this, I would suggest doing a bit more research. All the information can be found in a couple of minutes on CAMS/AASA websites or by calling them to ask.