We stayed for four nights in Nov 2021, and the campground was mostly empty, which gave everyone plenty of room to spread out without feeling too crowded.  There were good bathroom facilities, and water hookups when we needed them - otherwise boondocking with strict generator rules (be sure to check out which campsites prohibit generators entirely - generally the ones closer to the Rio).  There is good hiking nearby along the Rio Grande and the Boquillas Crossing is nearby (it was closed when we were there).  There's a privately run FHU campground about a quarter mile from the Rio Grande Village campground.   This location is about a 20 min drive to Park HQ, and another 20 mins from there up to the Chisos campground.  Our rig was too big to take up to the Chisos, which is why we opted to stay in Rio Grande Village.  We made the day trip to Santa Elena Canyon, which was amazing, and the scenic drive there was also worth getting out and taking a closer look at spots.  The park is so huge you can't possibly cover it all even in several days' time.