Cloud Driver gave you recommendations that in my mind is the way to go. If the early pioneer days and the Oregon trail interests you then the Hwy 26 is a gem. Great fun. The fact that you will have considerable needs of your RV, it would seem that Fishing Bridge CG is for you. Don't let the crowds worry you. It is always busy in the summer so take your patience with you and make meeting people part of the fun. Everyone there is engaged in the same endeavor you are, seeing some of the most amazing things on the planet. I hope you have a grand time.
