Just a comment about Wilpena Pound Resort Caravan Park.
About 3 years ago stayed there in a tent in the unpowered area up the hill, a really nice spot great views with a few trees around. It is hard to find a perfectly level spot, but is OK and a lot less claustrophobic (and cheaper) than the powered sights down the hill. Next time we visit there we would go for an unpowered sight up the hill, a bit of a walk to facilities, but not too far. The powered sights are very close together, our friends stayed in one while we were there and though convenient I think the pick of sites are up the hill in the more open area.
A great place to visit and the restaurant at the resort is not cheap, but real nice food. The Flinders are really a good spot to tour and a good spot for the meet.