definitely more of a nature experience than the other camping options I'm aware of in the area. Permits are free and can be obtained at the visitor center. There are not designated sites, you can camp anywhere that's far enough off the trail (rangers will brief you on how far you have to be). Feb was definitely really cold. We were huddling in a shiver bivvy. Will be back for sure but will bring the zero degree sleeping bag next time. The caverns are absolutely amazing and we consider this the best nature camping around.