We're headed to Williamsburg in the near term but not camping.
On that trip we were towing with a '82 Suburban (6.2L Diesel) and a 26' bumper pull bunkhouse. I don't remember having any issues with the mountains. I think we went over on I-64 at least part way. Coming back was a bit interesting. We got caught on a blocked road due to an overnight landslide.
The same trip we got into a major storm near Williamsburg but no damage to us. There were trees down nearby and windows out. We went from there through the Bridge/Tunnel and up the Eastern shore to Assateague, then across DC to a campground near Quantico (yep, I did tow across DC).
From there we went to Gettysburg and participated in another rainstorm. No probs with our rig but the guy across from us had a major issue with his awning. We didn't see it until it was really full of water. He was gone so a bunch of us in the campground bailed the water and then tilted his awning.
Good luck on the Williamsburg reservations. That is a neat place to go. We're going to be there 9 days so it should be fun.
Edited by: WoodcarvingGypsy
Al & Linda
2013 GMC Denali 3500HD SRW, Crew Cab, Std bed, 6.6L Duramax, Allisons, PullRite Superglide, Triglide
2011 Crossroads Seville VF35CK11