Trying to decide upon a "base" to use while in the Black Forest. We will be traveling by train from Nuremberg and departing to Regensburg. We will be traveling with luggage and would like to minimize the transfers to the location. We are planning on staying 3 or 4 days in one location and use that as a base. Our main objective is to see (by train) as much of the beautiful Schwarzwald as possible. Your comments / suggestions would be appreciated.