In January 1964, "Walworth County" got underway for Panama where she spent more than four months, making 16 transits of the Panama Canal, including one round trip which she completed in less than 23 hours. Late in May 1964, she returned to Little Creek and, after tender availability, took part in the "MEBLEX" and midshipman exercises. Following this, she made a call to New York for the 1964 World's fair and returned to Little Creek on 11 August 1964. While in port, "Walworth County" was used in the production of a Bureau of Medicine and Surgery mental health movie. In late August 1964, "Walworth County" again got underway for a lift to Guantanamo Bay, Cuba, and returned via Miami, Florida, on 13 September 1964.