One of the factors will be the size of the shop you are cruising on. The larger cruise ships can't get too close to shore. When I've cruised in Alaska it has been on Uncruise, whose ships are tiny in comparison (under 100 passengers). We got much closer to shore, and into smaller areas. Even so, my 18-200 lens was nowhere long enough from the ship, though it was great for when we were on skiffs. I also had an Olympus Tough 6, which is waterproof and did well for kayaking.

Gaudi. Just fabulous!

Definitely look into a smaller ship. I've taken 2 Alaska cruises with UnCruise, and highly recommend them.

That is what is known as v***r f***d. A crime.