We park our RV for the night in a variety of places, from campgrounds in the woods to luxury resorts to Wal-Marts and truck stops (well, just once in a truck stop. We had to try, didn't like it. Noisy, and bright lights all night.) One of the unique ones is in Sun Valley, AZ. It's a gravel parking lot for an abandoned motel at the exit on I-40 (the old Route 66), handy to the Painted Desert and Petrified Forest.
Not even in the same ball park as Omusee Creek, but a solid second place among RV parks. (Wal-mart is in a class by itself, simply because of the lack of hookups. We need electric in order to run the A/C, so even Omussee Creek and Route 66 can rank ahead of Wal-Mart, depending on the weather.)