Wendell "Mucho" Maas - The husband of Oedipa, Mucho once worked in a used-car lot but recently became a disc jockey for KCUF radio in Kinneret, California (a fictional town). Towards the end, the effects of his nascent LSD use alienate Oedipa.
Zoyd thumbs his way north. He stops briefly at a refugee commune in the Sacramento Delta, but when that proves too noisy and uptight he heads for San Francisco. There, he looks up Wendell "Mucho" Maas. Mucho is temporarily elsewhere, but Zoyd crashes at his palatial (but drug-free) rock 'n' roll pad for a few days, meeting Mucho's blonde girlfriend Trillium and her friends. Zoyd sings Prairie a silly lullaby, entitled "Lawrence of Arabia."
There's a brief flashback to Zoyd's meeting with Mucho (then an LA record producer) in 1967. In those days, Mucho was a major "head" -- but gave up drugs after a traumatic meeting with Dr. Hugo Splanchnick, an anti-cocaine nose doctor. Back in the present Mucho reappears, and reminisces with Zoyd about how Zuniga screwed up the Corvairs' shot at a recording career (a brief flashback here). The two share a sad, accurate appraisal of the scary way things are changing, and a grim (also accurate) view of the future.