We use Hyperlite Mountain Gear Pods for organizing gear inside our pack. One pod for shelter, ground cloth, inflatable sleeping pad, and stakes; one for food; one for storm clothes; and one to organize the little ditty bags of accessories (first aid kit, repair kit, toiletries, etc.). Shaped like the cross-section of a pack, waterproof zipper, and durable fabric make these immensely versatile and useful.