I was there in 2017 (my pre-Campendium days) and managed to drive my Rialto (22' VW class B) up the mountain. Best advice - pay close attention to the reservation details, site length, equipment, etc. I started off at a site that was in no way set up for an RV, but thanks to the host, was able to move to a better site. It is an old school campground but SOOO worth a visit. Allow plenty of time to explore.