Among the hundreds of winetasters Saturday at the Timber Crest Farms collective in Dry Creek Valley's were many who looked as if they might be en route to a campus party instead of a classic Wine Country event.A hand-lettered tribute to the Kappa Delta Zeta sorority on the rear window of a parked SUV hinted at the youthful flavor of the crowd. Several large parties gathered on the hill above the tasting room complex for the afternoon — their wristbands and glasses good for wines from all nine wineries at the site.