Does anyone have any good information on how to get from Sweden and/or Denmark into Germany by ferry? What is the name of the ferry one should take? Which one takes the longest time, which one takes the shortest time, and which one is the best? I heard there was such a thing as traveling by night, sleeping on the ferry---how comfortable is that? What are the hours for that? Thank you in advance for your help! I'm leaving tomorrow for Europe, running out of time now.