It's fun to know however that the Beatles Magical Mystery Tour was an (unsuccessful) attempt to recreate the wacky free-wheeling fun of Kesey's bus trip.
Although, supreme irony, a quote from the Boston Globe printed on the back cover of the DVD says, "it's the movie 'Yellow Submarine' should have been but didn't know how to be." Apparently the Globe got their Beatles movies mixed up.
Even more interesting(?) the bus featured on the front cover is the 1990 recreation of the original Further, not the original 1939 International Harvester.
Even MORE interesting, now that I'm familiar with the two buses, much of the footage in the movie showing Further tooling around with crazy people waving from the top -- it's all the new bus. Meaning it was shot AFTER 1990.
The directors' commentary, now that I'm watching it, mentions that some of the audio was dubbed in by actors reading transcripts of what was actually said, because the original was such poor quality and hadn't been synchronized with the video. This movie is vastly Hollywoodized, now that I get into it.