I only went to Glasto once. It was a free festival back then. Unbelievably laid back. You could amble without trauma upto the main stage ( there was only one ) watch an unknown band widdle away , wander off to one of the suspect choc cookie sellers, wander off to the beer seller, flop down on the grass, and generally float. Happy days.
Once it became a paid festy, i stopped going. I also went to a couple of other free festies, one being Watchfield and the other was Windsor. Windsor was a tad more manic then Glasto, as it was a much bigger festy, but nothing like the asbo filled horror of paid festivals these days.
I cant remember if Knebworth was a pay festival ... anyone ? I was at the Floyd one