Advice
I would say recruit the campers to help. In the coding studio, there were always a few kids who excelled at the activities and eventually they started helping me run the studio. The kids love helping each other out and once you have a system in place where you let them take some leadership among their peers, things ran very smoothly. This system was great because I knew the abilities of each of the kids and so, at that point, I was confident that just about every camper that came in there was getting helped because besides me I had atleast other campers, at a time, available to answer questions and to get kids started on the activites.