This is undoubtedly the quietest campground we have ever visited.  Not just because there were few campers, but its location so far from any highway or city.  I would also like to give kudos to the the fire crews who saved this area from the fire last year.  The visitor center and campground are an island of green in the middle of a charcoal land. 

I would categorize it as a tent and teardrop campground.  There are some sites where larger RVs can park, maybe around 25', but most campground spaces will only hold the car.  They have a lot parallel RV parking and that requires you sign up for two spaces, one for your trailer, the other for your car.  The lower campground, A, is more open, great if you have solar.  The upper campground, B, has more spaces and some for larger RVs.  

The drinking water faucets are irregularly dispersed and few.  You cannot hook up to them to fill your RV, so be sure to bring some 5 gallon containers to haul water to your RV.  There are flush toilets and sinks with cold water, no showers.  Bring all your supplies, as the nearest town is about a 40 minute drive.  There are very solid metal fire rings and picnic tables.  The closest dump station is in Tule Lake, but is excellent, with water and good drain positioning - and its free.

We had excellent Verizon service and were able to surf the internet, load and download pictures without using any booster.  I was also pleased to get a staff member directly when I called for information.  There is a lot to see at this park and I highly recommend it.

PS The helmet they sell ($8) saved my head many a time during cave exploring.