A group of my college friends and I are trying to plan a two-week summer roadtrip westward from Madison WI. We were thinking about visiting as many national parks and "must see" places as possible, hopefully reaching the west coast eventually. We'd also like to do some overnight camping or take a break somewhere for a couple days. However, we don't really know what places are in fact "must see" or how to go about planning a route. We also didn't know whether we would travel a northern route (toward yellowstone/seattle) or a more southern one (toward california). Any input on potential routes (where to go/stay, what (not) to see, etc) would be GREATLY appreciated. Thanks!