Hello fellow Victorian
Where in Vic are you ?
I don't know about any camping "groups" but getting involved in forums like this can lead to meeting like minded people who are looking for same.
We're in Stawell (West Vic) more camping areas than you can poke a stick at out this way.
Some national parks have long waiting lists for camping reservations.
When you have to wait a year to sleep next to a tree, something is wrong. ~George Carlin