Hwy 14 - 8% grades, 25 mph curves, 10,000' summit. It's a beautiful drive but not with a big RV. Not many places to pull over.
If you do a lot of scenic drives it might be worthwhile to get the 'Mountain Directory for Truckers and RVers'. Even though we drove many of the roads listed in the directory when doing them again at a later date we always referred back to reading about them to refresh our mind as to what's to come. Many scenic roads are just fine to drive.... but some are not.
https://www.youtube.com/watch?v=4dQ0grO91L4