Still in the planning stages of the trip. Some good websites to know.
http://www.mapsofworld.com/germany/federal-states/ state maps for figuring out what can be used for a state rail pass
http://www.hessen-tourismus.de/dynasite.cfm?dssid=166&dsmid=6483 Tourism around Frankfurt
http://www.germany.info/relaunch/info/publications/infocus/travelroad/fairy_tale.html#steinau Fairy tale road
http://www.bahnhof.de/site/bahnhoefe/de/bahnhofssuche__deutschland/bahnhofssuche/bahnhofsdaten__filter.html -This site tells you if a train station has storage lockers. It's in German. Type in the town. Schließfächer is a locker and ja is yes.