We were at Cataloochee CG for 6 days a month ago, I think almost every camper had a dog or 2 including us, no hook-ups and a pretty tight road getting in and out, but once your there it is really nice.
you can walk down the dead end 2 1/2 mile road past old church and school and house and barn looking for elk and turkeys, still can't take the dogs on the trails but you can do plenty of walking with them, very little traffic and super quiet.
It would be really nice in the fall.
we pulled a 25ft TT in and out, wouldn't want to do it every day but it can be done.