I just came back from Artfest 2009, and it was amazing! This was my first time at Artfest, which has been going for nine or ten years now. Artfest is 3 days of project-based workshops with teachers who are well-known for their techniques and/or styles, and often having been featured in one or more arts and crafts publications (such as Somerset Studio). The organizers are Tracey and Teesha Moore (teeshamoore.com). They hold Artfest every year at Fort Worden State Park in Point Townsend, Washington (2 hours north of Seattle). They have other wrokshops, too, so check out their website and try it for yourself.
For me, Artfest is the kickoff to my first "comeback" year as an artist after having had a 15-year art hiatus!