Well, had a good 4-day tour! I realized I had some friends in Mt Vernon/La Conner, so I took Whidbey Is back from Pt Townsend. Hwy 20 was ridiculous - had planned on doing a quieter route up to Anacortes then down, but was a little shagged from the previous day up Hurricane Ridge so just took the shortest way. :-p Centennial Trail was fantastic (and fast), and the busier sections in between trails/quieter roads were manageable.

I should probably take some time to stitch together all 4 days in one map, but here's each day of the tour:
Day 1: Bainbridge-Sequim
Day 2: Sequim-Hurricane Ridge-Sequim
Day 3: Sequim-La Conner
Day 4: La Conner-Seattle

My instagram profile with some shots: Instagram

Thanks to the community for the help!