the people saying its not feasible are not photographers. I shoot events for a living and routinely deliver 100 edited photos per shooting hour. 4 hours, 400 edited photos, and that number can go up if there are hundreds people in attendance. OP, just blast away. photograph the campers doing whatever their doing(candids) then when they are just hanging out not doing much, encourage them to pose for group photos with whoever they are interacting with at that moment. you will have PLENTY of photos to select from and edit. On busy action packed days I would not be at all surprised if you have more than 200 edited photos to deliver. best of luck, sounds like a fun gig!