There are a few tight turns, steep grade, and it's a narrow road. The lots are kinda big but getting there would be tough. I would park on top next to the freeway entrance and walk.
No!
If you have a tow vehicle use that and leave the RV in town. Lots of other spots to explore as well!! I wouldn't suggest trying to bring that whole setup down there, much too tight!
No, I agree with Juan. Park up on the main road and walk down. It could/would be dangerous to try to drive down there via the steep and narrow winding road.
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