How much time do you want to spend? Basic 7 day cruises are plentiful. If you are wanting a Cruise/Land combination you are looking at Holland and Princess. My Other and I are looking at the Combo for 2025. We feel if we are going that far we want to really see Alaska. Not just the coastline. Which means 9 or more days. We want to ride the train or bus from Anchorage to Faitbanks. To go up to Mt. Denali and Denali National Park. To be able to see Alaskan wildlife on tours. To us, other than being on the cruise ship, the land part is more important to really see what Alaska is all about.