 After the medical trials, Kesey continued experimenting on his own, and involved many close friends; collectively they became known as "The Merry Pranksters".The Pranksters visited Harvard LSD proponent Timothy Leary at his Millbrook, New York retreat, and experimentation with LSD and other psychedelic drugs, primarily as a means for internal reflection and personal growth, became a constant during the Prankster trip.The Pranksters created a direct link between the 1950s Beat Generation and the 1960s psychedelic scene; the bus was driven by Beat icon Neal Cassady, Beat poet Allen Ginsberg was on board for a time, and they dropped in on Cassady's friend, Beat author Jack Kerouac - though Kerouac declined to participate in the Prankster scene.