I have an Osprey Exos 48 that I have been training with for months and was planning on using for my upcoming 2017 NOBO thru-hike, but once I got all my gear together, I began to realize my minimalist pack-size mentality could be a problem. My sleeping pad is a ThermaRest ProLite Plus, and rolls up shorter than 12", so it cannot be held to the bottom of the pack with the given cords. My question then, is what is the best way of externally mounting my sleeping bag, a Kelty Tuck 22, to the bottom of my pack? Bungees? Accessory straps? How? Onto what? Thanks for your input, and happy trails!