Lubeck to Travemunde by Boat

[pdx13]

One of our cruise stops is Travemunde. We plan to take a train into Lubeck, but thinking about a boat trip back. Anyone done this? There seem to be a number of river cruise options out of Lubeck, some of which go to Travemunde.

Not certain about one way, though. Just thought I would check here before researched it further.

[Cruiseline Virgin]

I think this is the wrong Thread, Luebeck is on the northern coast of Germany, not the meds