Sue, I would add this. Ask them to actively support your DS in all the ways he needs it-- but also support him in becoming more flexible in small ways.
It is much harder to get understanding and accommodations at a camp than at school. But that also makes camp a good place to work on going with the flow.
He is getting to the age when you will be less and less able to manage his environment. Soon it will be more and more on him. I wouldn't pull him out when it gets rough-- I would educate the teachers and teach him to adapt as much as possible. That's best for him in the long term.
