I went to Knebworth once - no idea when between 74-77 most likely,(my carefree student days) for fun frolics and Freebird. And, in the pre-thieving capitalist b****** days of tickets, saw Queen and the Rolling Stones in Hyde Park. "See" being a euphemism for being there - not seeing much at all - except two of everyone
Never been to Glastonbury myself but at a recent soiree it turned out my wife was the only one who'd paid to get in. Fence climbing was the order of the day, dunno if it's still the same?
One lady there used to be a nurse in the OD tent. She said she walked round giving people a kick once an hour to make sure they hadn't died. Young people, eh?