Hen, I've taken the 194 a few times from Sea Tac to downtown Seattle. The drivers are very nice about telling you which stop is yours.

Trek420 will be taking that bus on Friday from Sea Tac to where I work.

Edit: be sure Free Range knows you are coming and what your time frame is. I've had things I hoped to have them to work on when I've dropped in, and they just couldn't manage it.