Camp See-A-Tree is a camp for underprivileged boys.
Homer, Lenny, Carl and Moe all went to Camp See-A-Tree when they were kids. Homer, Lenny and Carl attended together, and met Moe on their first day at the camp. Moe introduced himself as a junior counselor, but in truth, Moe's parents had abandoned him at the camp (according to an adult who worked at the camp, Moe's parents dropped him off at the camp two years previously and they never came back for him).
The boys enjoyed their daytime activities at Camp See-A-Tree, but at night they had to work at Camp Land-A-Man, the all-girls' camp on the opposite side of the lake. They were put to work in the kitchen washing dishes. When the boys questioned why they were working in the girls' camp's kitchen, Moe explained to pay off the lawyers' of parents whose kids died at the camp (according to Moe, at least a dozen kids had died at the camp).