Most often it's the turn radius getting into the narrow sites and the narrow road , pick a site you can back in and worry about height clearance , the campground has a one way road and 17 is near the bottom of the loop so you have several tight turns just getting to the site Always best to park and walk in and talk to the host .You know it's 13 miles on a 9-12 % grade just to get to the campground off 395. If you have google earth pro you can drill down and see the layout of the campground.