Basically the whole road is campable. Wash, little trails, back in areas, little pull outs. All kinds of places. Quiet and dark. Few people travel the road. There is 5G service as long as you stay on the highway side of the hill.
No resources whatsoever. 100% off grid.
I love the canyon and mountains here. There’s hiking nearby farther in the canyon and has never been an issue finding a spot for or Sprinter here.