By Ben Marks Between 1966 and 1967, San Francisco rock poster artist Wes Wilson designed posters and handbills for the first Trips Festival, the last show by The Beatles, and dozens of concerts at the Avalon Ballroom and Fillmore Auditorium featuring everyone from The Association to Frank Zappa. Along the way, he defined the psychedelic … Continue reading Psychedelic Poster Pioneer Wes Wilson on The Beatles, Doors, and Bill Graham