This site is a SCAM. They are intentionally deceptive and designed to lure traffic from bona fide sites that are commissioned by the National Park Service and that charge minimal fees. They prey on people who think they are booking with the (real) National Park Service. They will not refund the fee once they've got your credit card number in their hot little hands. Oh, and when you call to complain, they gleefully cancel your reservations, keep the fee, and re-book to someone else charging an astronomical and unjustified booking fee.