Phil...I have spent a lot of time in the area and I cannot think of any place that I would have boondocked. The geography appears to be pretty bleak and empty but that is far from the truth. There are lots of hogans spread out and sheep pens. Plus that is all Navajo Reservation and one needs to be careful not offend.I would recommend driving in and taking a camp site for a couple nights. depending on the time of year, a person might need water or just a quiet place. And the fear of flash flooding isn't a concern in the Park itself. I want to add too...that being out there in the Park at night is pretty spectacular.
Gary Haupt