@nana43 @scoop I am also curious about those who do long hiking trips. @nana43 were you camping during the 18 day hiking trip or staying in lodging? Do you do AC with all the bells and whistles @scoop mentions, and if so, how does that work on a 18 day hiking trip? I recall another poster who was hiking the Appalachian trail while on the Big 3 and wondered how she was managing her AC on such journey. I guess my assumption was that she was relying solely on the daily exercise (with breathing techniques) for airway clearance but didn’t think to ask at the time.