I am thinking about purchasing an Aarn Pack...not sure which one yet, but does anyone use these with a bear canister? If so, which pack, and did you have to make any modifications to the pack (eg. do you have to remove the liner? or dividers?) My bear canister is a Bearikade Expedition (9" diameter, 14" high) and is required in Yosemite where I will be hiking this summer. I really think I would like the better/more natural posture with an Aarn pack, but...got to fit in that bear canister. Any thoughts/ideas would be appreciated. Thanks.