We use 25% of body weight as a max guideline for backpack loads. Even this gets hefty for the leaders who push over 200lbs!! My son weighs in at around 100, so I try to get his pack to weigh no more than 20 or 25 lbs. This usually covers all his "scout essentials" plus gear and clothing. He has his own tent (3.5 lbs). The max weight I have lugged is about 48 lbs (I weigh 196) and even this was tiring after 4-5 miles on the AT in western Maryland. Hilly, rocky terrain can drain your stamina quickly with this kind of weight on your back. Since that shakedown hike, I have been able to keep my pack weight below 40 by leaving all the stuff that may be "nice to have" but not really necessary, at home. We also repack all of our foodstuffs and don't carry any fresh or canned foods with us. Backpacking has become a family activity for us - my wife and daughter join us on weekenders when we're not out with the scouts. Even our dog, Daisy, comes on these jaunts into the woods (yes, she has her own pack). Getting away from the high tech in our lives has added a lot and we value this time together.
Steve Harter, Asst SM, Troop 2, PA Dutch Council