Ds is in the same boat as cookies. On his way to Camp today. He has a few kids his age, which is the top age but most are younger. I told him to make the best of it.
I always ask him to remember when he was the littler guy and always asking to play Pokemon, YuG-i-Oh or Magic with the older kid and they always did.
Ours is not an academic camp, if it was I am sure I would want him moved to an appropriate level for him.
They do an quick evaluation first thing. I am hoping that he will fit in with the middle school kids and if not, they will consider moving him to the high school group. Or figure out how to make middle school work. It is only 6 days. He can deal six days.
I think the problem is that this is residential. They could move him easily if it were Day camp. But residential would mean moving him in with kids 18 years old, so they are hesitant to do that...they keep the two groups in different dorms and very separate.