This kind of situation has happened to me before too. Usually when I say I have diabetes they let me go. At school I have a 504 plan, which basically says things like: I can test my BG in class, I can go to the bathroom whenever I want, I can always go get water, I can eat in class... etc. You might ask your parents about a 504 plan, or class accommodations. At the beginning of camps I always explain to leader/coach/instructor brief diabetes knowledge. Hope this helps!