A good way of making teams that does not show any favoritism and surprises the campers is to get every camper to take their left (or right) shoe off. After that get them to throw it into the middle or off to the side (Note: all to the same place). Make a pile of all the shoes and then just start throwing them into smaller piles making the teams. After all the shoes are thrown, tell the campers to go to their shoes and that is their team.