We had some very good counselors, but they were just college kids or in their early 20s, just like I was. I knew at least a couple of counselors that smoked pot on their time off, and I also stumbled (almost literally!) on a counselor and a teacher having sex in a sleeping bag...right out in the open! It was after hours, so I'm sure none of the kids would have seen them, but still! The camp nurse was also very young and inexperienced, and didn't catch an ear infection in one of the campers until his ear started to drain. And the main source of entertainment on our nights off was going out to bars to drink.
I think if I were going to send my girls to camp, I'd research the camp and the employees very thoroughly!