If I'm reading the schedule right, it looks like the last AS/QX flight back to SEA is at 9:30 p.m., and on Saturday it is at 6:00 p.m.
Otherwise, rooms can be had at the Doubletree for $78 and Hampton Inn for $74. If we do this before the end of Feb, some of us may be able to use a stay to get those Hilton Gold Challenge bonus points.