Your kids are at an age where they can decide. Trying to control them is like trying to control anyone else, it usually back fires. They'll figure out a R that works for them.
If you and your H were still together and the girls wanted to do their own thing on a holiday, would that be OK or would you expect them to be with you?
I've had to do a lot of letting go in the last couple of years and more to come. It's difficult.
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss