I'm not going to name any names, but when my brother's class had their 8th grade trip to KI, one kid's parents were so strict, they wouldn't allow him to go, because school was for studying, not trips and fun. We all liked him, he was a great person, and the smartest kid in school.
The eighth grade homeroom teacher took him anyway, he went to the park still in his school uniform, and at three o'clock, the teacher and he left in time for him to be back at the school for his parents to pick up.
From what I understood, the parents never found out. I learned something important from him that day. The other kids were staying til the fireworks, but he had to leave early. They asked if that bothered him. He said it didn't, that you enjoy things more when you know you have a limited amount of time.
I live by that credo.