A tangent if you will... I've not thru hikes either but at some point, does not your tent, sleeping bag and backpack all smell like fermented ass? Even with an armpit wash, you aren't exactly clean or smelling of roses when you crawl into your sleeping bag. Town clothes are stuff into the backpack right next to all of the other funkalicous stuff. Sure there are stuff sacks but is anything airtight? Are you packing town clothes in ziplock bags? Etc. Sleeping bags could be stuffed in the machine at the laundry mat but on a down bag that's asking for trouble I would think. You can't throw your backpack in there. So, what is a person to do?