I enjoyed my stay.  I was able to get in even though I didn't make a reservation.  I might add that most gov run camps now require online booking and payment.  Some of the sites are small and would be hard to get a larger RV into so you might want to call the keepers and ask about that.  Nice bathhouses and a great playground for the kids.  You might want to be close if you have kids and far from it if you don't…  I will probably visit there again.  Senior passes and other National Park passes are honored.