Thom and Thunder Mountain and I pretty much agree except for Trail Ridge some with T M.
I do not recommend it at all for RV's. It is all those things mentioned. People will be over the line and you have no wiggle room. Most of the people that drive it even in a car are not experienced mountain road drivers and white knuckle it and go slow and over the line. And they get out to look at elk some 400 yards away - sometimes leave their car in the middle of the road to do it. And the hairpin turns on the west side nearly mandate an rv in the inside to go well over the middle line.
As far as Winding River. Nice park I think but you are on the west side of the Park with very little going on there. So you drive at least 1 to 1 1/4 hours to get over to the east side for all the activities. And far more than that to get up to the great, highly desired Bear Lake area.
