I love using packing cubes to pack my children. Each child has a set of packing cubes in different colors so that I know whose are whose without having to think about it. I put all the pants in one cube, all the shirts and tanks in another, socks, underwear, and bras in another, swimwear and towels in another...etc.
When they get to camp, they use the cubes until the first laundry so they never have to unpack! It also makes for a neat and organized bunk...for awhile anyways!
Parent of a Camper