If you camp, camp at the Portal. It's $8.00 a night provided the Isuzu Organization stays there. If not I think it's $17 a night. BTW - that's camping at the Group sites. That's the way to go anyhow. There are plenty of trees, lush grass, two ponds to let the dogs go run around, 8 hot showers.
I promise I haven't seen a better camping spot two blocks from the center of Moab anywhere.
Peace.
Tom