I am really sure the landowners are going to put it several miles of water pipe for an event that happens once a year.
The free standing bogs cost somewhere between £75-£100 each to hire and service for three 4 days. So that is a £2.50- £3.30 cost per attendee for a start. (Regulations are no more than 30 people per bog).
Then there is generator hire, (there isn't an mains electricity for miles either)
Then all the other odds and sods. Its costs the £8 to put the event on.
£8 a ticket, £1.50 a pint for real and and rough cider, several bands that ought to be. Out in the middle of nowwhere with no hassles. It is a bargain.
I can put up with no running water, and so does every one else who attends the events.