"Hmmm, what's that about?"
Then, a few days ago, I searched Campendium for a free campsite near Phoenix where I could stay a night to break up the drive to Roosevelt Lake.
"Oh, look! Buckeye Hills Regional Park. With excellent reviews."
The road in is paved until just past the sheriff's training center and firing rang, but the unpaved road is in very good shape.
I thought the park would be crowded, given its proximity to Phoenix, and the fact that it's snowbird season. But it's almost deserted. A pickup & camper, two Class A's, a family of tent campers and me.
There have been a couple of visits from low flying military jets, and there's occasional gunfire at the firing range, but it's mostly very quiet. The light pollution from the Phoenix metro area (about 25 miles away) is minimal.