REALLY beautiful. REALLY COLD.
The ports of call are just like the ports of call in the Carib. Islands, the only difference is hard woods versus palm trees, tourist shops selling knit caps versus straw hats, cold versus hot, and building styles.
If you tour inland, get some mosquito repellent wipes. Those buggers can get you through 3 shirts, a sweater, and a quilted jacket!
If you gamble on the ship, play 3 card poker ... it's your best odds.
You are going to have a blast. Oh, by the way, don't let the cruise line talk you into "open seating" ... get assigned seating for either early or late serving. In open seating, you really don't get to know the folks you eat with unless you share the same seating table every night. Take along lots of throat lozenges, and flu meds ... if you have to buy those on the ship, they are WAY TOO EXPENSIVE.