I think you can still drive the loop in monument valley on the res, but the campground is closed and there is a hotel on top of it. I talked to the hotel last summer and the new tribal camground was still not open. There is rv style car camping at Goulding's along with film era B&B right across from the hotel in the center of monument valley too. That might be the best bet as theres the tribal and gringo diners. Dispresed camping on the res is a no no without permission. A little further north is dirt rt through "Little monument valley" across from window rock. Pretty sure there is open blm land or fsr there for "dispersed" camping and along the verde(?) river at mexican hat.