Ok, found another nice Hotel. This one is closer and slightly cheaper - plus they have many available rooms for Saturday Oct 13th. They also have free parking and WLAN.
74 euros for a single room or 120 euros for a double. Only 26kms from MielenWerk too.
What do you guys think? Who is with me?
Hirsau Abbey
Wildbader Straße 2
75365 Calw
07051 96740
hotel-kloster-hirsau.de