My wife and I took the cruise to Alaska as par of our Honeymoon, and I could not have selected a better trip, to have a relaxing time.
Saturday (getting to Seattle): Unlike many people, we took Amtrak Cascades Service from Vancouver, Washington (just north of Portland, Oregon) to catch our cruise. We caught the train at 9:00 am, and arrived at Seattle's King Street Station by 12:15 or so. We caught a cab (15 cabs or so were waiting outside the station doors), and for $7.00 + tip, we whisked Bell Street Pier (about a 5-10 minute ride).
Embarkation was easy with the right paperwork in hand. We were aboard and checked into our state room by 1:30pm, with plenty of time to spare before the ships departure. We went up too the Market Cafe for lunch, which was quite tasty.