Since I'm a poor smuck stuck with a regular job, other than taking a week off to go some place, we are normally only bicycle camping in the distance that we can get there and back in one weekend. That means the nearest state parks for us. No problem there as they have showers. And, yes, I want to sleep cleanly. Don't care so much what I look or feel like during the day short of a layer of dirt if I get caught in wind blown dirt.
The Arkansas trip last month was 203 miles of "hotel camping". Showers were obviously available. Only rode five days so we just did laundry at the end of the ride.