We are going Thursday night Phil, looking around Friday. From your question, have you booked a secret pitch there, and want to suprise us. Is there a prize for the first to find it? Lol.
I booked in by phone for the tickets, was then passed on to the on-site booking office. Apart from close parking,
they also have water, showers, toilets, and provide everning entertainment. The fee for this was £27 for the three of us, and had we booked the tickets through this office. We would have avoided the extra £1 fee applied when I booked. Usually they are full months before, but plenty left two weeks ago. Well worth a try, the only down side is arriving the night before, as we have to vacate the site to the car park, before 10am on Friday.
Rgds Graham.