In the early 1960s, Bulkeley commanded Clarksville Base, Tennessee, then a tri-service command under the aegis of the Defense Atomic Support Agency. Having lost none of his wartime daring, Bulkeley was known to test the alertness of the Marines guarding the base by donning a ninja suit, blackening his face and endeavoring to penetrate the classified area after dark without detection. This was a dangerous endeavor, as the Marines carried loaded weapons. Ever popular with his men, who both respected and admired him, Bulkeley could be seen driving around the base in his fire-engine red Triumph TR3 sports car with a large silver PT boat as a hood ornament.