There is a process in Queensland for creating clubs (car clubs included). The Department of Fair Trade has a website with guidelines etc that may be of interest. I understand that you need seven members to create a club (I checked when a crazy thought to recreate the Holden Van Club came into my head a couple of years ago).
This may be of interest . . http://www.fairtrading.qld.gov.au/as...nonprofits.htm
No doubt every state would have someting similar.