We had the pleasure of cruising Alaska on Pacific Princess - so cute! (one of the old R class vessels - we had 2 or 3 cruises on her). We were the last cruise of the season (after we departed, it was traveling to Japan) and the captain wanted to see one glacier he hadn't made it to yet - so he drove that ship like an Italian sports car! I swear I felt the thing heel ;-) We also sailed Seabourn in 2018 in Alaska, which was OMG so wonderful. I won't go on ships over 1000 passengers these days (that's too many - I'd prefer <500 - but we did Oceania Marina which is 1250. It was ok; I might be able to do it again if the perfect itinerary arose). [my first Alaska cruise was on HAL, back in 1986, with my parents ;-)]