Ok. I just weighed my Cambo 45 on the bathroom scale. Camera in backpack, two lenses with backboards, shutter release cable. It weighed exactly 10 pounds. Film holders and film will obviously add a bit of extra weight. Four 4x5 film holders, grabbed at random, weighed 1 1/2 pounds, minus an ounce or two. That does not seem terribly bad to me. I have shlepped a lot more weight than that around the mountains before.