It's getting increasingly difficult to staff residentials, too. Personally, I really enjoy them, but many of my colleagues would rather gouge out their eyes with a rusty spoon.
Don't forget we're putting in 6am - 10pm days, minimum.
If it's term time, we're setting work then picking up the fallout after 5 days of our classes running amock under cover supervisors.
If it's at half-term, we're giving up our holiday.
Either way, those of us who are parents are missing out on precious time with our own kids.
OK, phones on trips are a PITA for teachers, & I'll be honest, that's a consideration. But more to the point, I truly believe, from extensive experience, that they cause the kids in my care aggro which massively outweighs the possible benefit.
If you can't get your head round the notion of your dc being away for a couple of days with no moby, then please, don't send 'em.
Don't undermine the ethos of the trip - we don't have to run them & your dc don't have to go - but if they do, they need to follow the rules.