I have four Canon cameras and more than enough lenses. My most recent purchase three years ago was the 5Dmk3. I purchased the Fuji X-T2 last year and haven't used my Canon since. The X-T2 handles well, good lenses, although the menu is a bit complicated.
When the sun is lowest in the sky, about midnight, the light is fabulous. Nighttime could be chilly. Been to northern Norway many, many times, great country.
I recently tried re-installing lightroom after changing computers... I have an IMAC. No trouble, except when I provided the serial number, Adobe found I had purchased the program but did not allow me to register. Insisted I had the mobile version. Still working the problem, need to telephone them. Be sure you have the serial number.
We did the Columbia River cruise in 2017. Great cruise, scenic, the tours were good, and so was the food. I don't believe American Cruise lines has any connection with Carnival. Enjoy your cruise.