I would've called the cops. We were at Diamond Lake last year staying in Broken Arrow CG. We noticed at one end of the CG this big group of trailers with a very large number of people hanging out at one spot and some music playing. Wasn't loud at the time. Well around 9-10:00 it got real loud. Next thing I heard was a cop car, It wasn't sirens but you could tell he was in a hurry. Bingo the music stopped.
Personally I would've reported them as drunk and out of control. All it takes is one time and they'll stop.