Hi Simon, welcome to the forum. I’ve visited the NYMR a few times, the last time was the 2009 Spring Steam Gala, when they featured the Tornado, and got to rid behind it from Goathland back to Pickering, arriving at 17.40 on the 4th May, where I’d parked my car a short distance away.
Hope you get your Prairie finished and can show a photo of it.
Regards Nick.