Not directly related, but last year we took Mrs W's MX5 to the Classic as it was the 25th anniversary of the car.
It was organised through the MX5 owners club, came with infield passes and a parade circuit pass. As far as I know the owners club had arranged this with event organisers and the club members were the beneficiaries.
I can imagine that the package we got is probs similar to the club package we got so feel free to drop me a PM with your question(s). I may be able to help, or I can ask Mrs W who arranged it all, or might not have a clue (but am happy to do some digging). It's worth an ask.