Thanks for a great report & blog. Sounds like you had a great time. Sorry that I am so slow in responding to your post. We are considering a similar trip but during early summer 2020. AMA appears to be one of the best providers of river cruises in Europe. How were they to work with in planning excursions and transfers? How strenuous were the walking tours? We have great endurance but our speed is an issue and we are afraid of not keeping up with the tour groups.