Playing guitar and singing on the first few Beach Boys albums in the early 1960s as a young teen, David Marks didn't know just how big a wave the group would ride.
"None of us had a clue," he said by phone last week from home in eastern New York. "We were kind of just having fun."
Marks credited the songwriting, band management, Capitol Records and "the hunger America had" for Beach Boys music for making it stand out for multiple generations.
Marks will perform Saturday afternoon as part of the The Legends of Surf Music with Al Jardine, a founding member of the Beach Boys, and Dean Torrence of Jan & Dean at Mayfest on Main in North Myrtle Beach.
Marks brought up the joy of seeing audience members in their 70s as well as young children sing the lyrics of Beach Boy hits such as "Surfer Girl," "Catch a Wave" and "In My Room."
His favorite Beach Boys song to play live in the Legends band remains "Surfin' U.S.A."
"The energy in that song kind of defines the Beach Boys' identity," he said of memories still fresh from those early years with Mike Love, Jardine and brothers Brian, Carl and Dennis Wilson. "Today I find the same thing."
When group leader Brian Wilson stopped touring with the band to focus on songwriting, Marks played second guitar. Later, his solo career also would include projects with Gary Busey and the late Warren Zevon.
Last year, Virgin Books released "The Lost Beach Boy: The True Story of David Marks, one of the founding members of the Beach Boys," which Marks co-authored with Jon Stebbins.
Marks said researching material for three years produced many revelations for him.
"Carrie, my wife, did a lot of date checking," he said. "We found a journal ... where my father had managed the group on the road for a Midwest tour."
Marks said he spent part of his life blocking out those times, "but I kept in touch with the guys."
He said pouring his thoughts into print about the band's genesis, he remembered the camaraderie shared. "We were really close," Marks said.
Someone's remark that he and the late Carl Wilson had an influence on other young guitarists made Marks' day recently.
"To have made a contribution like that," Marks said, "and to have the honor to play those great songs with those guys, it's a big, huge honor."