I'm sure here's been a huge amount of preparation & planning for this application, and some of the comments in the thread so far highlight challenges which were identified at the outset...

These include-

"people with significant mobility disabilities"

"Much easier (flat but narrow) access is available via Thorn Park from the northeast which could be made one-way." (concerning arrival & departure of caravans)

"Everything depends on reliable and frequent transport"

=====
While the application is still under consideration, I can understand why there is a reluctance on the part of organisers to jump the gun and go public - it might even affect the outcome.

My fingers are crossed.

John