Fred makes a good point. We also enjoyed just walking around some of the various ports in Alaska. It's America, after all, so accents, money and other things are familiar, even if the scenery & wildlife isn't.
Just my two cents here: if you do plan to take an excursion or
rent a car from Skagway to drive into Canada, make sure you have your passport or birth certificate with you! Border agents going back into the U.S. may be fairly strict requiring the proper I.D. And do make sure to take some sort of wildlife excursion if you are cruising on the big ships, as it's a lot more satisfying to see them up close than through your binoc's from a distance way up on those tall decks.