RFCN2 wrote:
The most spectacular mountain spot in the USA to me is Many Glacier. The campground there is OK for all size rigs. From there you can take the boat and hike up to see Grinnell Glacier (hope I got spelling right). Just the play of light on the lakes and surrounding mountains is worth the trip. Go to the lodge and sit around the open fireplaces. Watch the sunset.
A bit north is Waterton Park. The RV park there takes rigs of all size. The view from the close by Prince of Wales lodge is breath taking.
+1
Would highly recommend staying at Many Glacier. Long drive to get there but you are in the heart of the park, surrounding by streams, lakes and mountains. Took my teenagers there in 2009, no electronics, no problem.
Waterton park to the north in Canada is also worth a couple days (assuming you have passports).