Can anyone give their experience on booking Carnival's shore excursion Berlin by train including Sachsenhausen Camp from Warnemunde? Looks like it might be a chartered train with no AC? Were there bathrooms onboard, what was the meal/snacks, were you able to see all the sights or was it a very quick driveby in a bus once you reached Berlin vs walking tour? Would you recommend or not and why? Any and all info you can provide on Carnival's excursion, an outside tour operators bus tour of the same, or taking the non-chartered train on your own to Berlin to only do some sights in Berlin (not including Sachsenhausen Camp) would be greatly appreciated.