I recently visted some of those parks. I just got back from traveling and sleeping in my car out west. I had Nice Sometimes I stay inside because It’s just too peopley out there shirt and 4 layers on top and bottom. Some nights I would wake up sweating. It was absolutely freezing a couple days in south dakota at the badlands and mount rushmore though when a cold front came through. If I ever hit the lotto I learned I am headed to wyoming or montana. Amazing to drive 70 plus miles and not see any towns.