I have a question for those of you who have used down sleeping bags on thru-hikes in the past. How did you wash the bag while in town? I know of the techniques of using tennis balls or clean shoes to keep the down from clumping together, but what if those two methods aren't available? Do you just constantly monitor it and take it out of the dryer periodically to check for and eliminate clumps by hand? I would like to get a warmer bag for my thru next year (currently using MHW Ultralamina 32) but I don't want to pay too much of a weight penalty. I've only ever owned synthetic bags and I love how easy they are to care for.