Went on several Rhine cruises when I was stationed in Germany, you will enjoy them. I wouldn’t be too worried about security, especially in Germany. German authorities don’t screw around. Germany was one country I always felt safe in.
I was stationed in Germany ‘86-’87. I agree. Felt totally safe...except for the feral hogs hanging around the dumpsters, LOL!
But - we’re living in a whole ‘nother world these days.
Beau wants to go on a cruise - I HATE open water. This is our compromise. :)