I have a new idea. IF you were to get some kind of a bag or pouch that is water proof / or a empty cleaned doritos single serving bags and wrap it around your psk would it be goodas a water collection / storage bag. You would tape ot so that it fits flush. It would also help waterproof your kit

Ken, Another way of thinking "outside the box" You should give anything you devise a good field test, both for water carrying and durability against wear and tear from extended carry.

Chris, I noticed in your bio that you have experience with horses. Do have the book "Horses, Hitches,and Rocky Trails" ,by Joe Back?

The Packer's Bible? yes indeed. I collected every book on packing I could find and , like any subject found new information in each. But if I had only one book for packing skills and pure pleasure in reading it would be Joe Back's book ;O)