Well worth the approx $55 is Camps Australia Wide 5
It lists Free and low cost camp spots, rest areas etc
The ultimate travel guide for the budget-conscious traveller.
Also check out (free) http://ozcamps.net/
Its an ever growing online guide to free/low cost camp spots
using a google maps thingi.
And don't forget NSW State Forests are free to camp inhttp://www.dpi.nsw.gov.au/forests/recre ... es/camping
and National Parks are generally cheaper than Caravan Parks (not always)http://www.environment.nsw.gov.au/nationalparks/
Although we are in Vic, it is a similar down here
Our last few holidays cost us
$0.00 - 3 nights Mt Buangor State Park
$0.00 - 8 nights Paradise beach camp ground
$75.00 5 nights Princess Margaret Rose Caves Camp Ground, Lwr Glenelg National Park (great facilities)
$0.00 1 night Bass Valley Reserve
$52.00 4 nights Smith Mill Camp ground, Grampians National Park