I absolutely was not a fan of the music. The songs themselves were awful, and the actual singing was cringe-worthy. I found myself skipping forward through a lot of them because I just couldn't. I kept wishing I was watching Sleepaway Camp instead.
I'm coming late to the game on on this one. This was a bad and not particularly enjoyably bad one. The casting couch scenes bothered me a lot and I don't have much to add on that that hasn't already been said. Regarding the twins' ages, I did have the feeling that the twins were maybe just entering their last year of high school, or maybe had just graduated. I got the sense that this was a pre-college time for them and their last summer they had to be at the camp, so I'd put them at 18.
I was also bothered by how Camille decorated the inside of that pantry door like a high school locker with a shrine to her mom. Is that a thing in kitchens - to decorate the inside of your pantry doors?