You can find a route map at http://www.soundtransit.org/x11204.xml (click on the stations for exact addresses and other info). We stayed at the Hilton Seattle Airport, which was immediately across the street from the light rail station and airport. I believe there was a Holiday Inn almost next door. If you're at a hotel that is not quite so close to the station but which has a shuttle to the airport, you walk across the airport's large parking structure to ge to the light rail station. Worth the commute? Up to you and your budget, and where you want to spend your evenings.