They don't sell those little rolls of Charmin to Go™ where you live? Look in the camping gear section of your local Chinamart, they probably have them. If not, grab a roll of regular unscented TP when it gets down to the last few feet and put it in a ziplock baggie and put in in your pack. Plain old paper table napkins or even paper towels work fairly well too and don't generally have a scent applied to them. In a pinch a cheap facemask will do, don't ask me how I know that...[:-]