Just my $.02, if you only have time to play 1 course in the Seattle area, and have an appreciation for what makes a course good (even if it kicks your ass), Seatac is the one to play. I can't really dis Lakewood, as I really like that course too, but the Tac is our premier course. Kinda like Milo and Timber down there, both good courses and right next to each other, but if you only have a chance to play one, then hands down, Milo wins. You MIGHT want to forego keeping score at Seatac, that generally helps to keep my spirits up there on most days.
Wish I could make it in time, and of course, that my back didn't feel like Wilford Brimley's. You should have a good time with Andrew though, he's a cool dude and a good player (further incentive for not wanting to keep your own score).