|I'm in the generational gap between these age groups.|
There are not very many thirty to forty somethings and all of them are either coupled off or coupled off with kids. If I were not here to take one potentially last trip with my mother, this boat definitely would be the wrong demographic for me. You can only photograph so many island shorelines with snow covered peaks before it gets a little redundant.
Second tip is don't move around too much. It actually lessens your chances of a good shot. It is just like hunting deer, accept you are using a camera and your prey is harder to catch.
After I gave up on scenic photography for the day, I milled around the ship bored out of my gourd. I finally broke down and snagged some trash fiction and drank tea until dinner.
Here is my final bit of advice: Days at sea generally call for formal dining of an evening. We did not realize this and came under dress. They will give you a loner coat, but don't be that guy. It's embarrassing.