I'm looking to go from Copenhagen to either Wismar or Lubeck in July using public transportation. I plan to see both Wismar and Lubeck so I dont care which city I start with (since there are trains that go between them). So, I will start with whichever city has the easiest route from Copenhagen. I read somewhere about a train that goes on a ferry - I'm not sure I understand how that works, and going to raileurope.com doesn't help. Can you please advise me!