I'd love to do a European river cruise this summer. The itineraries and excursions look awesome. The single supplements are outrageous and the cruises are already on the pricey side. I'm especially interested in the Russian River cruises. I'm in my 50's, live in Calfornia, and have done a lot of travelling. I'm very easy to get along with. I'm usually fairly active when I'm on vacation, but I don't expect my travel partner to do the same activities as I do. Anybody want to start considering this wonderful possibility?