For motorhomes and big rigs the three main campsites are really the only ones I would recommend camping in. 

There are some small boondocking campsites further up cave canyon trail road but the road was pretty rough in spots. 

Cell phone service was great in the campground and we got good data speeds. 

The vault toilet was clean and there's a few garbage cans spread out the campground. 

In October there were other campers there but there was an open site every day. 

Some jeeps and OHV's went by during the day but it was still a great place to camp that was quiet at night.

This is the free campground. There's one that costs money with hookups a few miles away on the road that leads to Fort Stanton.