Dear Mr. Binkley,
Thank you for using History Hub. Records of the Peace Corps (Record Group 490) are housed at our College Park, Maryland facility (Archives 2). Here is a listing of series of textual records.
From this list, you might wish to search “Public Relations Subject Files, 1962-1970,” and “Program Correspondence Files, 1963-1995”. For more information on these records, contact the reference staff at Archives2Reference@nara.gov.
Best of luck in your research!