We will be in smaller towns in Bavaria for about 10 days in December. When we were in the Black Forest in May we had a hard time finding a laundromat. We will need to do a wash at least once so we can pack light.
We will be in Esslingen, Rothenberg, and Dinkelsbuhl during "laundry prime time" in the middle of the trip.
I don't love handing my stuff off to hotel services, would much prefer to do it myself. (And have had several interesting experiences at laundromats in other European countries--definitely a slice of life!) We are staying in small hotels, no chains, so haven't seen a single mention of a hotel self-serve laundry. What would you suggest?