Before there was Narara there was Sunbury. Before there was Sunbury there was Ourimbah.
The festival drew 6,333 patrons according to Ian McFarlane, but Bernie Howitt's 1994 account states that there were about 6000 on the first day, but that by the second day there were some 10,000 people on site. Bernie btw is a Foundation member and to my mind knows more about music than Glenn A Baker
Rock Through History
(Longman Cheshire, 1989)