rod5687480 wrote an answer about JanSport Carson Backpack - 4900cu in on August 27, 2012
This pack is not well suited for your use. There are other's that are specifically designed for that. They have a support shelf on the bottom instead of the supporting frame on top. You can remove the bag and just use the frame when you need to. I have one that is comfortable with a 90 to 100 lb. load, not that I would want to carry that more than a couple miles. My legs would be the issue, not the pack/frame.