Thank you, @julia. I booked a guarantee and don't have my cabin assignment yet, so haven't printed out the boarding pass.
I thought about using the Sky Train. I went on the website and it seems complicated. I couldn't figure out if there's a station near my hotel, and buying a ticket seems difficult. Seems like it's set up for daily commuters, not one time users. I've had bad luck with using public transit in other large cities. People weren't very patient with me as I tried to figure out how to use a new system. My biggest concern is traveling with a suitcase and if I would would be able to get it onto the train car and where to stow it once on the train.
Thanks for everyone's information and advice.