No he doesn't have SEN but he hasn't stayed overnight anywhere before so I would have no bloody idea how he would be come nighttime.
So I can't tell you the changes of me needing to go
Ok, calm down. I'll explain myself better, you clearly didn't get my point.
When I asked about the chances of having to fetch him, I simply meant do you honestly think something will happen that you will require you to fetch him?
He may never have stayed away from home before but surely you know his personality enough to know if he would get to an inconsolable, hysterical state because the family are not near. The reality is, he will be having that much fun and that tired of a night, he won't be spending his days thinking of you all, all day and night, so he will be fine.
You've created a drama where there doesn't need to be any. You've asked him if he wants to go on the trip, he said no, I don't want to be away from you all, that's fine, he doesn't have to go.
As long as you have made it clear that you are ok for him to go if that's what he wants to do then there is no need for this fuss. He doesn't go, end of.
The whole not being able to reach him after midnight until 3am is your anxiety not his.
There will be meetings before the trip that will go through what will happen in emergencies, when parents will be contacted etc and the procedure.
If he's an anxious child then you need to support and dispel his fears, not feed them by not encouraging him to go.
My child did a cub camp for his first nights away from family. He was nervous, so was I, but I gently told him all the fun things he would be doing, he would have a great time and didn't project my worries on him. I also told him that he couldn't just leave mid camp so he had to be sure. He was, he went and he loved it.
Sometimes a child needs confirmation off their parent that it's ok to feel nervous, that it's ok to be away from family and it's ok to have fun away from the family.