And came across a map of the 1969 IOW Festival on this page

http://woottonbridgeiow.org.uk/gmodern.php

(2nd image)

Now, I always thought that pop festivals in this era were pretty basic things - couple of joss sticks, acoustic guitars, 2000w pa systems. What I wasn't expecting to see - in the bottom left just south of the 'Environmental Playground' - was the 'CAR JOUSTING ARENA'.

This, I feel, is an element that has been lacking from subsequent IOW festivals.