Maybe someone can embed the photo, but there’s a famous photo of Brian Wilson’s “posse” at LAX in 1966. Volman is standing next to Brian. Dean Torrence (of Jan & Dean) and Danny Hutton (of Three Dog Night) are other luminaries in the pic
https://www.reddit.com/r/thebeachboys/comments/o0s1s3/never_seen_this_one_before_i_know_only_three/