Haven't been there in years. Back then we took a rented Pathfinder and I was really glad it wasn't my car. I'd call them and get a current assesment. Be aware that this is what they say on their own website: http://www.nps.gov/chcu/planyourvisit/directions.htm
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
2017 3500 Dodge Maxi DRW 4X4, Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, etc.