Well, I spent Sunday evening and all day monday of memorial day weekend in the area. As I had mentioned, my maps showed two "dry washes". checked out both.
One is located off the Moore cut-off road, just east of the "dry wash" petroglyph panel. Found four road in the area (2 each heading north and south)- one obviously maintained, the other looked well used but ran out of daylight before going far on any of them.
The other is located a few miles west of the Cleavland Lloyd Quary. Lots of roads in the area. Drove one for several miles south where is slowly became less and less traveled, but nothing real rough. We came to a point where it turnd from generally south to east along a fence line. At that point my kids where becoming anxoius to get the the quary, so we turned back.
Don't think I learned anything real useful as there are too many trails in both areas to know which one is the issue and for all I know there could be any entirely different area as well.