Went there on the hottest day of the year.  Every other campground was full but this one was sparsley populated when I arrived.  I looked forwarded to a peaceful evening under the stars in a pretty place.  At 9 PM still many open campsites but a few large noisey groups set up camp and proceeded to talk and play their radio until midnight.  It appears they decided 12 AM was the cutoff.  Most agregious was a youth (14 -17 years old) group of about 12 boys.  They roamed the campground all night just screwing around and making noise.  The adult supervisors did nothing to control the boys.  I could have used another 2,500 feet elevation to escape the heat and the other "campers".  I left first thing in the morning.