National Park Reservations Don't use that website nationalparksreservation.com Internet
When I typed for lodging in Yellowstone National Park in Google, this www.nationalparkreservations.com website popped on the first of the list. I didn't pay enough attention that the national park website will end .gov. I went to this website and get all the list of the hotel motel names include Holiday Inns, Best Western, and many others, I selected online reservation, and typed my request for 2 rooms. Unfortunately, I didn't read careful enough, there is a small paragraph right above the Process My Reservation!, indicated the cancellation will cost 10% per reservations and this website is not affiliated with the National Park Service Branch of the Federal Government.
Thus, without knowing which lodging I was assigned to and how much it is, I was booked for 2 rooms with separated reservation number.
When I realized that is not Government Park Service and all the lodgings are outside the park, I cancelled the reservation, of course I didn't get my 10% back. I wish my experience can provide to other people and pay detail attention to these website looked like what you thought to be, but actually it is a scam. By writing some sort of disclaim in some corner maybe legally off the hock, but never morally.
Plus, those scam websites, you never will find a real address.
Dana
Scottsdale, Arizona
U.S.A.