Aboard The Columbia, and sailing The Inside Passage To Alaska..be sure to bring tie downs for your tent.
Ok, so maybe it is a bit late to set sail, now that the days are getting shorter, but still possible, and you can rent a cabin room, but seriously, every Friday the ferry leaves from Bellingham, to Alaska, and it's a much nicer trip, I think, than a cruise ship.
They have a great restaurant, and a snack bar, and the views are incredible, and it's affordable..
Check out The Alaska Marine Highway.