Magic Trip , highly recommended despite bad reviews. Best part is one of the special features: unedited audio of Ken Kesey answering a nurse's questions during his first LSD trip in 1959, as part of CIA-sponsored experiment in a veterans hospital in Menlo Park, CA.
Ken Kesey, Further, and the Merry Prankster had such a simple idea, get a bus, paint it, and travel across the United States. Although, if you have read about the trip, it didn't seem like alot of fun at some times. It was more of the idea of what they did that has inspired my writing, and shaped my view of impacting culture.