[Eugenia Gabrielov]

Though I couldn't find a good guide, here's a few tips:

Try to make sure you're covering all the material concisely. Are you running multiple short workshops during the camp? You can say "what was your favorite workshop?" or "rate the workshops", and why were #1 and #(last) the way the were?

That's the actual camp. You may also want to ask questions about how helpful things were before the campers' arrival, if they had adequate info, how the food was, stuff like that.