When I discovered on my e-mails a last minute cruise, I checked the airlines and yeah, it was affordable. I thought I wasn't going to Alaska until next year. I booked Alaska Air going and Southwest returning roundtrip Seattle/Burbank.
At Sea-Tac we walked across bridge to Seattle Shuttle to Pier 91. $22 PP. And it's closer than walking to the Princess Shuttle. We did see helpful Holland/Princess guides at the baggage pickup to guide them to the shuttle. It's a shared ride.
We were on Plaza deck 5. I like to buy a Cafe card for $33 total. That gives you 15 "Starbucks" type designer coffees." As well as unlimited fresh brewed coffee, tea, hot chocolate. I do this on every Princess. Their coffee in the restaurants and room service is the coffee syrup. When I am on Plaza deck I don't need the morning room service, I go to the Int'l Cafe for 2 large lattes.
Plaza 237. Close to getting on and off of ship. Nice to be close to Int'l Caf' for snacks and fresh brewed coffee. Last time I was on Plaza we were closer to the front of the ship where it bounced more. Might have been rougher seas.