I would ditto Ricks remarks, you can also head down Chuckanut, over Colony Rd, under I-5, across Prairie Rd, up Hwy 9 too and tie that in. I've heard that north of Everson that Reese (sp) Rd is good too.
If you look for Colony Rd and the F&S Rd that's a fun little stint. Recently did Hwy 9 south to Hwy 20 via Sedro Wooley, to Rockport, Darrington for a nice day trip.
Anxious to hit Winthrop too...................my two cents.