We cycled into Dillingen on a Saturday evening. We did not have a hotel booked and went to several hotels in the town centre. They were either fully booked or too expensive. We found the Hotel Garni Trumm with the help of another hotel receptionist.
From the outside the hotel doesn't look like anything special but once inside we were very impressed.
The hotel manager was very friendly, polite and helpful. Our room was spotlessly clean and very bright. The breakfast was excellent and even the bicycle garage was spotless. The location is a pleasant 10 - 15 minute walk from the town centre.
If you are cycling the hotel is just off the bike route.