In 1961 he produced "Oh Carolina" by the Folkes Brothers, which was released on his Wild Bells label. The drumming on the record was provided by members of the Count Ossie Group, nyabinghi drummers from the Rastafarian community, Camp David, situated on the Wareika Hill above Kingston. After becoming a hit in Jamaica, "Oh Carolina" was licensed to Melodisc, a UK label owned by Emil Shalet. Melodisc released the track on their subsidiary label Blue Beat; the label would go on to become synonymous with 1960s ska releases for the UK market.
Campbell recorded prolifically throughout the 1960s; notable early ska releases include: "Madness" (1963), "Wash Wash" (1963, with Ernest Ranglin on bass), "One Step Beyond" (1964) and "Al Capone" (1964). The documentary This is Ska (1964), hosted by Edward Seaga and filmed at the Sombrero Club, includes Campbell performing his Jamaican hit "Wash Wash".