If you have never RVd before, and your kids are that age, and you are from Carolina, you sort of have to make a choice -- do we do a lot of driving? Or do we have fun and let the kids be kids? (Don't ask me how I learned this painful lesson.) What seems most interesting to you -- mountains? The ocean? It is hard to do both (except in northern Washington).
My recommendation is this -- don't try to do too much! If you only have two weeks, don't do more than two or three long driving days.
If you make this into an ordeal, the kids won't want to do this again. If you make it fun, they will want to do it every summer.
What time of year is this? Is it mid-summer? If so, the Major National Parks will be jammed, especially Yellowstone. Lots of traffic -- the roads are narrow, and the folks all stop when they see animals. There are Los Angeles-style traffic jams, where you are stopped and you can't tell why you are stopped, for a long time.
Glacier is a little less crowded, and the access points are all along the perimeter of the park, so the roads are less impacted.
Here is a wild idea -- with the dollar so strong against the Canadian dollar, think about flying to Calgary and seeing the Banff/Jasper area. Not a ton of driving, really beautiful, great roads.
Good luck, and let us know what you decide so we can all chime in with more specific suggestions!
