Has anyone been to/done the Yellowstone, Teton Park, Jackson loop? Any advice on free camping or what to see while you're there? I'm doing a road trip from the Cali coast to the east coast in May and was wondering if anyone had some good insider tips/info on that particular area? We have about 3 days to see them all, not trying to stay there too long because we have other places to go. Any advice is great, thanks!