I lived in Eugene for a few years, and got more gigs there as a folk singer (sea chantey specialist) than I ever did in the SF Bay Area. The Willamette Valley Folk Fest is a great event (although it looks like you missed it), and Country Fair is an amazing scene with great regular acts like Suzanne Rand, Baby Gramps, Artis the Spoonman, Trillian Green/Hanuman and a very esoteric bunch of neo-vaudevillians. Yes, it's a haven for many of those who got "on the bus" and never got off, but IMHO it's the kind of festival we need more of in this country.
Also Sam Bond's Garage is a great club that books folk acts. There's also the Eugene Folklore Society that puts on house concerts and the like. Pete Lovell, a dj at KLCC, runs the folklore society and would be a very good person to contact.