What was this youth camp movie?

in the movie, the camp had kids ranging from 6 or 7 years old to teens, the counselors were too strict and the kids revolted and locked up the counselors, one of which got killed by one of the older kids. the kids went crazy, one rapped a girl and they had their own trial, he was found guilty and they hung him. at the end some of the kids came to their senses and overthrew the leader of the revolt and released the adults.