Hey Mike -
Are you going to be a 'carpool' (2 people?). If so, I would fully recommend cutting over to I405 as you get a carpool lane all the way to Lynnwood. Also, consider hitting Seattle area before 2pm if you can. Fridays get pretty crazy up thru Lynnwood and Everett. You'll find that Seattle was the easy part...... If you go home on a weekend day, I would also recommend 405 as well as I5 backs up from Northgate thru Downtown most days.......
David