There are no bad roads if you are on the main roads. If you can stay between the lines then drive any of them since semi's do it all of the time. Driver might not get to enjoy the scenery as much since you should pay attention but it's just a two lane road.
Use common sense up and downhill. If you have TV that is marginal on power watch for overheating going up and use lower gear downhill with light use of the brakes.
If it was as difficult as some folks make it out then the landscape would be littered crumpled RV's.
Easier to drive Colorado than through Boston or New York City street