Hi Alan,
we are happy you'll be attending

Here are a few hotel recommendations:
Our first recommendation: The Motel one is located in Lübeck's old town, right next to the Rathausmarkt, and it takes about 25 minutes by bus to get to the TH Lübeck event location
https://www.motel-one.com/de/hotels/luebeck/hotel-luebeck
The Niu is located directly at Lübeck railway station and from here you also need 20-25 minutes by bus to the event location
https://the.niu.de/hotels/deutschland/luebeck
The Radisson Blue is located directly on the Trave, the river that flows through Lübeck, with a view of the old town:
https://www.radissonhotels.com/en-us/hotels/radisson-blu-luebeck?cid=a%3Ase+b%3Agmb+c%3Aemea+i%3Alocal+e%3Ardb+d%3Acese+h%3ADELBCSEN
The Park Inn is located between the main railway station and Lübeck's old town
https://www.radissonhotels.com/en-us/hotels/park-inn-luebeck?cid=a%3Ase+b%3Agmb+c%3Aemea+i%3Alocal+e%3Apii+d%3Acese+h%3ADELBC1
If you need more recommendations, please let us know: mootdach25@th-luebeck.de
Best regards,
Verena