Appreciate the good service, and enjoy yourself!
One thing I would like to mention: On this cruise, unlike the other three we've been on, there was ample free time provided at several ports to shop. Portugal is know for its vineyards, olive trees, almond trees, tile and pottery making. And everything you see has "made in Portugal" clearly stamped on it, and often the names of the artists. We did not see a single "made in China" item in Portugal!
The Hemming is quiet and comfortable. A wonderful boat.
Only sail if you have limited mobility and are elder. There are many cruise itineraries that are far superior to this one.
This cruise was quite different from other Viking River Cruise experience in that for most others, the towns/attractions were very close to the river. In this case, there were many long bus rides since most towns were small and relatively uninteresting near the dock (Porto was an exception). We spent many hours on the bus, so it is good to be psychologically prepared.