South Australia has a great Holiday + Camping pass which we purchased for a recent trip. It is valid for 8 weeks, a concession is $72.00 full price $90.00 which is entry and camping fees to most of the parks. This allows camping for up to 5 days in each campground and considering Deep Creek Conservation Park is $24.00 per night ( showers ) we soon recouped our $72.00. We stayed 12 nights in parks so at $6.00 per night that is cheap camping and The Lincoln and Innes NPs are spectacular and well worth visitinghttp://www.environment.sa.gov.au/parks/Park_Entry_Fees/Parks_Passes/Holiday_Park_Pass.