Havens on those ships are exactly the same. Same food, same layouts. What makes the difference is the concierge, butler and room steward. Just off Encore 2 weeks ago and Bowen was very organized and great concierge. Naveen was our butler, and he was great too. Will be going on Bliss in August, not sure who concierge is, but like the itinerary.
For port excursions go to NCL Cruises. in left hand corner click on Explore, then click on shore excursions for Alaska and then the port you are interested in exploring. Everyone enjoys different things and has a different budget, but. we like whale watching, Mendenhall Glacier in Juneau. in Skagway the train, or Scenic bus tour to Alaska sign etc. Ketchikan, we like walking around town and creek Street. Sitka we like the Best of Sitka tour, and icy Strait Point we like either whale watching or riding the gondola to the top of the mountain.