The school trips I went on were in residential establishments owned by local authorities, run by staff who handed control of the visit over to the teachers and who had to be paid for every activity they accompanied, and who to sleep in the building at night so if there was a fire the onus was on the school staff to evacuate the premises, after having been shown the procedure once. Unsurprisingly , most of them have closed or only cater for adults.
Plus entertaining the children in the evenings until bedtime, making them hot drinks, administering medicines, patrolling the corridors and of course, dealing with bed-wetting and worse, homesickness and nightmares. Supervising wash times, insisting on suitable clothing and footwear for walks, sorting out packed lunches ( I can't eat that), no time away from the children until you went to bed, and then returning home on Sunday night and being ignored by parents with not one word of thanks. No time off in lieu, so a 12 day week without a break.
The cost of taking children on commercial school trips is phenomenal; I have accompanied two, and I wouldn't trust the care of my children to some of the adults employed.
There is a liaison between some of the Academy Trusts and these commercial enterprises, as in school uniform packages.
Free holiday fro teachers!