Has anyone done this cruise, or used Viking for a river cruise? Friends have invited us to accompany them, and I am already signed up, but I am curious as to what the "vibe" of a Viking cruise is, this one in particular. I tend to see cruisers as either Newlywed, Over Fed, and Nearly Dead, in my mind Viking fits into the last category. Any thoughts would be helpful, as I have a bit of time before I lose my deposit. Thanks in advance.