Sounds like we do have a few people in the general area who are interested, and I know of 2 more who haven't responded who might be up for something. I have heard of some local se7en owners teaming up for track days in the past, but that's not my thing with the Westfield, so I've never paid close attention; however, Bruce Beachman may know.
If people are interested in putting together a tour for next summer, we could widen the net and do something similar to the PNW2007 event Slomove organized; CA>OR>WA>BC>CA. I've done Monterey>Seattle via back roads a couple of times, and this summer did a much shorter loop from Seattle>Mt. St. Helens>North Cascades Highway>Seattle. Or, as benny_toe suggests, we could organize around a basecamp for a few days, taking day trips from there. Someplace like Whistler might be good for such an event. Bottom line, lots of options in this corner of the country.
-John