Yes. You need to cross a small dip at the side of the road. Drive diagonally through it and you'll be fine.

I would also say "yes". We tow a 39' Raptor toy hauler and made it in just fine. We only went so far as the ASU Study site but could have made it further down the road taking a right at the "Y". Going left at the "Y" would not be impossible but it would be awfully bumpy - I mean like a catastrophic earthquake happening in your trailer for every foot of travel for the first mile or more. Both directions offer turnaround points and numerous site options.

Yep. Unhook before you drive in. We towed a 16’ cargo trailer behind our 36’ fifth wheel. Plenty of room.

I'd say yes. I took my Airstream with very low clearance in. When the road forks stay to the right. Go really slowly and there is a loop at the end of the road where you can turn around. The worst part is the rocks protruding from the road. Straddle them when possible. It's gorgeous! Enjoy

When I was there a couple months ago I saw 2 people make it down there in similar sized RV's. However, they were not towing cars too. The only spots that will likely fit this size vehicle are at the very end of the road (turnaround location) or about 1/4 mile before the end on the right hand side