By 1971, Herrick had retired from film and lived in Florida, where he had become friends with several Apollo astronauts. He was also an avid stamp collector, an interest that he had begun to develop in the 1930s and had directed a short film about in 1939.[7] During preparations for Apollo 15, he asked astronaut Alfred Worden to carry 144 postal covers to the Moon and bring them back for sale.[8] In addition to other postal covers carried on the mission, the commercialization of Herrick's covers resulted in the Apollo 15 postal covers incident, and the astronauts were effectively fired from NASA. Worden later described Herrick in his old age as "a cross between Santa Claus and everyone's favorite grandfather", but admitted he should never have taken the offer: "I was too old to believe in Santa Claus."[9]
In his retirement, Herrick wrote columns for the San Francisco Bulletin, the Los Angeles Examiner, the Boston Telegram and the London Express, and narrated a local television show in Miami, Ports of Call on WPLG-TV channel 10.[10] Herrick died in Saginaw, Michigan in 1987.[11]