You shouldn't worry too much about camping....at a good festival you keep going until you drop, then just find somewhere to kip.
At the IoW festival of 1970.....I kipped on a putting green of a golf course...very comfortable.
The 70 line up....
Joan Baez
Chicago
Leonard Cohen
Miles Davis
Donovan
The Doors
Emerson Lake and Palmer
Family
Free
Richie Havens
Hawkwind
Jimi Hendrix
Jethro Tull
Kris Kristofferson
Moody Blues
Procol Harum
Pink Fairies
Taste.
Ten Years After
Supertramp
Joni Mitchell
John Sebastian
Sly & The Family Stone
The Who
Plus a few more that time has forgotten
that was the year that a destructive the 'oooo were followed on stage by a triumphant hendrix at about 3am in the morning.
i read about it in a magazine.