very important point.
touches on the topic of always washing your padded bike shorts daily, having two pairs so one can continue drying next day if need be.
and I too have not toured in colder months, or if I have, have still had access to campground showers or a hotel, baby wipes are a simple alternative to making sure underparts and feet stay sort of clean.
Actually, in my experience getting out of bike shorts and airing them out and getting my body aired out is the key more so than washing. I have gone on multi week and multi month tours with one pair of bike shorts that got rinsed out fairly frequently, got laid out in the sun sometimes, and washed thoroughly once in a while without issues. I do find it critical that I get out of my shorts and into something airy asap after riding. I tend to wear short running shorts with a light mesh brief in camp and to sleep. Washing up is good, but airing out even more critical imo.