I've done a lot of traveling, both domestic and international, but aside from a couple visits to the Grand Canyon I haven't seen much of the great western parks. Yosemite, Yellowstone, Glacier, etc. One reason I have hesitated is that I don't want to be one of thousands of "families" crowding around some "attraction" in the height of tourist season. I like to do a bit of hiking, climbing, some trail biking, and that sort of thing, but not where it's crowded. My impression is that during the summer - school vacation time - that's what I would run into. So I'm thinking that a car or RV vacation at the end of Summer - 2 or three weeks - might be the way to go. Any insights out there on how to plan such a trip? Stay at lodges or elsewhere? Hidden or unknown gems? Places that are over-rated or to avoid?