Seeking tour or guided travel recs

[Staph]

13. All the European river ships are of similar design, but the sizes vary by river routes.

Those on the Seine hold 168 passengers, on the Elbe 98 passengers, and on the Douro 106 passengers. The other European ships, on the Danube, Main, and/or Rhine routes, hold 190 passengers.

The ships for Egypt, Asia, and the Mississippi vary by region.

I took the Grand European Tour back in 2014 and loved it! Casual, comfortable, good food, interesting people. The tours in the various ports of call are separated into small groups that are mobility limited, with normal mobility, and those who want to test their limits. I'd go again in a heartbeat!