Grand Canyon National Park. Not recommended.

[Mark.b2]

6. We used it there...

and most recently at Glacier. We foolishly went there during June. The time of year to visit any park is key.

My problem with the reservation systems we've used is they are OK getting in, but then people can linger as long as they want. The parks then get full.

Our most recent national park was Death Valley in October. It's a site to behold! And there were few people. Of course, it's location and its lack of appeal to many people helps.

Most overated national park...Mount Rushmore. But, the Badlands and Devil's Tower nearby (relatively) make up for it.