We will be on a river cruise and the day we are ported in Passau, there is an optional day tour to Cesky Krumlov. The bus will take approx 2 hrs to and from. I can't imagine the tour itself being more than 2 or 3 hours. To me, it doesn't seem worth it, and perhaps the day in Passau would be better. If someone is familiar with both places, I'd appreciate the in put. Thx
They are both very pretty small towns. I visited both and if I were you I would go for an optional tour to C.K. Bus ride is scenic so I would not consider it as a lost time.
Last April I was on a river cruise and took an excursion from Linz to Cesky Krumlov. We left at about 8:15 a.m. and arrived at 10:30. We had 4 hours in CK, which included a 1.5 hour guided tour. In my opinion, this was enough time to get a feel of the town, which is very picturesque and charming, and well worth visiting. I had time to take Rick's walking tour and scale the Castle Tower, which I highly recommend. I also bought a trdelnik and ate it sitting by the river. But, unfortunately, I didn't have time for a proper sit-down lunch in one of the riverside restaurants, or tour the Castle, or see the Marionette Museum. (Though I might have had the time for the museum if I didn't get a bit lost!) I would say you need a full day to really see the town and all it has to offer.
I never did get to see Passau, so I cannot tell what I missed.
If you are going to see Prague on you trip, you might find CK a bit redundant.