Starting from Seattle, looking to hit lots of California, GrandCanyon, Utah, South Dakota, Wyoming, and Montana. Lots of National Parks (for which we have no reservations because we're planning late!), fishing, swimming, hiking, national monuments etc. Family of 4 (10 and 7 year olds). My main question is, should I go with: 1) The RV/Sprinter Van with the intermittent motel. or 2) The minivan with camping gear and lots of motels. Anyone who can speak to the pros/cons here would be great. I'm mostly concerned with it getting hot as Hades during the night, and not being able to sleep. Secondary consideration for refrigeration (we have some dietary restrictions). Other big questions I should be asking?