The August 18, 1960 issue of Downbeat covered the Newport jazz festival and the Cliff Walk Manor events with two detailed reports.
First one (by John S. Wilson) was titled 'Newport The Music', the other (by Gene Lees) was titled 'Newport The Trouble'.
Wilson detailed the Newport festival, Lees covered the going-ons at Cliff Walk and took the photos that illustrated his article, including a superb shot of Eric Dolphy practising the flute at the seacoast that graces the magazine front cover!
The Cliff Walk festival was a one-time affair, as far as I know.