We stayed at 36.076792,-115.565461 for three nights mid week in mid October.  This particular spot is right off the paved road and easily accessible to most vehicles.  We had no trouble in our 26ft Class C.  We also saw a lot of vans and RVs just staying along small pullouts along the road, which wouldn't be ideal but it works fine.  

We walked around along the deeper forest roads and found so many more established sites.  Mostly those were only accessible via a jeep or truck but a few could be reached by larger clunkier vehicles as well.

The area was so quiet and peaceful, though there were plenty of other campers about.  Everyone stayed a good distance from each other and nobody was obnoxious or loud.

Some trash, but we've seen worse.

No services here, no toilets or trash, so please clean up after yourself.

Good cell signal for Verizon and ATT, though the ATT phone would randomly lose service now and then and would have to be restarted to find the connection again.  Just past this spot is when you start to lose signal as you head down into the canyon.

Nights were very quiet, except for the coyotes singing.

No shooting is allowed in this area, and we didn't hear any gunfire when we were there, but there were plenty of old bullet casings all over the ground.