From what I understand, it is a "parking area." This is for Saturday only. It just means you pull your car into the show, and they have an area in the show designated "young guns", and you put your car in that area. You will be surrounded by cars built by under 25er's and I think those cars will have a separate award handed out by whoever is sponsoring that parking area. And yes, if I was you, I would put it in that section, or the muscle car section. That's where I'll be Saturday.
I just wonder if I can enter, because mentally I'm only 22