Have you checked things out on the internet?
I personally know several people who have fasting hypoglycemia. So far, not one has become a diabetic yet although I know it can happen. As a rule, all of them get grouchy and HUNGRY RIGHT NOW when they are low.
The key to handling these lows is to accompany any fast acting carb with a little protein. This helps keep the liver from releasing glucose, causing another low. It avoids the see-saw effect.
A handful of peanuts with a small glass of juice, peanut butter with the bread or crackers, a piece of fruit and a bit of cheese. Balance bars, Glucerna bars and other granola bars are excellent for this, but the protein and carbs should be pretty equal.
As the mom of two grown daughters and a retired teacher, I encourage you to send her off. The things she will see and learn will be wonderful and will be good experience for her. Have her pack some snack bars and be sure to discuss this with one of the Chaperones and your daughter so both of them know what to do if they hit a rough spot. I don't think it will happen if everyone is prepared. The fact that you are searching for answers tells me you've raised her well
Good luck to both of you on this adventure.
Mich