I use a 20L to stuff my 3 season sleep system in ,(2 snugpak jungle bags and blanket, nested) . This and a tent, Alps mountaineering Lynx, ride in the pocket created by zipping 2 wings to an F1 frame with a Vapor 7500 zipped to wings. No pack space is wasted on tent or sleep system. Two 10L dry bags are used for other necessities that must stay dry (clothes and TP, foot powder ,alcohol fuel, batteries, etc) and serve to organize inside the Vapor 7500. The pouches seen on internet that molle attach to packs may serve to organize but are too heavy with limited opening. I will need a few more 10L dry bags, atleast one to line my dump pouch so I always have dry tinder/kindling for the Solo Lite wood gasifier stove.