Take HWY 79 either north or south from your location. Drop these coordinates into your GPS or better yet Google Earth - 33°10'43.32"N - 111°21'5.91"W
You will note that this is a quad off-loading parking lot. Take the dirt road from this lot due East. Plenty off good locations, although I believe that once you cross over a cattle-guard down that road, you have not entered into the Nat Guard Range, but it seems to be seldom used. They say if the cattle guard is blocked, they training is going on. But as many times as we have been out there, have never seen it blocked.
Lots of quads and motorcycles in that area, so indeed be careful. And of course --- police your brass and trash. Try and pack out more than you brought in. We need to do our part in order to keep the State off our back.