Being a camp counselor sounds like fun, at least if you have never been one. Fresh air, paid to work with kids, regular meals, simple hours. Ok, so they're simple meals, hours are regular, and the kids get fresh - but its not "work" work - right? If you're the camp cook keeping 400 people fed, its quite a lot of effort, and safety for that many people isn't easy either.
Yet the daily heroic efforts of our eighteen year old staff members is nothing compared to what awaits them after the zombies rise. Most of the children will no longer have a family to go home too. Where will the food come from? With boyscouts you're dealing with 14-18 year olds, though as to if ones with an independant streak and teen angst is any better than dealing with a younger crowd is a good question.
Actually, I don't have answers for what this would be like right now. It would certainly make an interesting scenario, depending on the camp.
The boyscout camp I attended had two shooting ranges, replete with a large number of .22 bold action rifles, 20 gauge shotguns, and bows. Not that you'd let the kids themselves hunt zeds, but four or five dozen guns on hand and a couple hundred rounds of ammo isn't a half bad stock. Food service came weekly, and the closest town was a small one about twenty miles away. (Wal-Mart arriving a few years ago was a major event.) There was a big lake in the middle of camp, and while there certainly wouldn't be much fish - water shouldn't be a problem, nor wood - give its in a Forrest and near an old tree farm. On the other hand, scouts stay in tents, so security would be a big problem if the walkers entered the property.
From what I recall, the child to adult ratio would be somewhere in the 10:1 to 20:1 range. While some would drive, most people come to the camp via bus - there would be no way to migrate the population without outside assistance.