Glacier National Park was absolutely amazing. Since we only had one day there, we chose to drive the Going to the Sun road. The views were fabulous. From Avalanche Campground to Rising Sun picnic area, RVs over 21 feet including tow vehicle or toad are prohibited. With more time, we would definitely have taken the Red Bus tour.
http://www.travelinglongdogs.blogspot.com/2015/08/glacier-national-parkgoing-to-sun.html