Re: Games Stores in Germany; Spielgeschäfte in Deutscland. H
The problem with the "days of wonder" search tool is that it will come up with every store that has somewhere within its sortiment also 1-2 boardgames. I did a search near my home (Berlin) and it came up with a lot of stores that principally sell stationery (Schreibwaren). Those stores won't have a big sortiment of board games but probably a small collection of card games and that's it. The search tool does not indicate which stores are games-stores only.
But maybe somebody from around the area you are travelling through can give you valuable advice.