We had a cancelled flight to contend with. Although booked through Viking Air (and they did know about the cancellation) they offered no help. We were on our own. We arrived on the cruiser at 2pm - not a good start.
They don't tell you that other cruises moor alongside. It happened three times in our trip - not good.
They don't tell you that you cruise more at night than during he day. If you go on the off-cruiser tours you will hardly see anything of the countryside.