Have heard about the panels but could not find them as the directions we received were sketchy to say the least. After some research and just plain driving around we found them. They are in basalt out crop on the North side of South Ash Creek. You can drive with in about .75 miles of the place and hike in. There are no trails so you have to bushwack. Be sure you hike in from the Northern end as it is easier to cross the creek bed. The rocks contain several panels in one area.
S. Ash Creek Panel: 37°20'11.34"N 113°17'23.63"W
Good Luck.