I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
At the point marked is a gateway to keep off the roadway for TOAL.
I would imagine parking nearer to the event area may cause some concern from security on site during festival season.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 29/06/2022. It remains the responsibility of any pilot to check for any changes before flying at the same location.