I did fly over the area after landing at Green River to link up with my friend and his 182. The road to the west, 100th ST on google maps, is where people are landing. No obstructions, reasonably wide but appears to have some gravel on it. Looks quite doable. Good backcountry stop for ice cream or even a shower.
We stopped at Cedar Mountain, Mexican mountain and Mineral Canyon. Of the three, Cedar mountain is probably RV capable with wheel pants removed. Mexican mountain definitely not. Brush and soft conditions are not good for low wing and little tires. Mineral canyon maybe, although it is soft at the south end and quite a few varmit holes up to 8” in diameter.