Our ship is docking in Rostock in May and we would like to take public transportation to the old town center then on to Schwerin Castle for the day and return to our ship in the early evening. Can anyone advise how to do this on our own and approximate costs? Can we purchase tickets at or near the cruise terminal for the train or bus we would need? Also, is there an ATM (cash machine) in or near the cruise terminal? Many thanks for helping us with our adventure!