Grand Teton National Park is a great place to tour with your RV. At this point, all campgrounds that accommodate 5th Wheels (and other motor homes) are closed for the winter season, but some roads are plowed all year long and should be passable. "Teton Park Road" is open as of today, but does NOT get cleared in the winter. Gros Ventre, Signal Mountain, and Flagg Ranch campgrounds are all RV accessible during the open months. Make sure to reserve space in advance as they fill up quickly. Try www.reserveamerica.com if that's what you want to do. Have a great trip!