This is not so much a lesson as it is just an amusing antidote. When I was a Scout we had a kid in the Troop that was a bit small for his age. He was part of our Troop High Adventure Team, as this was before Venturing. When we went to Philmont he came along and someone took a picture of this backpack with two legs walking down the trail. You could not see a head, arms, or anything else. The photo was named “Walking Backpack”. The Troop had the photo enlarged and hung up in our Scout Hall. I kind of wish I had a copy of that photo...
The lesson... if you are going to go backpacking, be bigger then the backpack....