I've been preaching this for a while. I'm a 22 year old college student at Penn State. Born and raised in the area, been going to the races regularly since early high school. I think in particular Port is missing the chance with college students. No one at Penn State even knows the track exists, and a majority of them drive right past the exit on 322 regularly. I have taken a good amount of friends I've met in college to the dirt tracks, but with the price of books and tuition, it's tough to talk someone into the hour drive plus admission and food etc. Maybe even a "college day" promotion would be cool, take out an ad in the school newspaper for a week, and offer $5 admission to anyone with a valid college ID. Just an idea.
I think the "with valid school ID" is the wisest move - some 18 year olds are already working full time, and some 22 year olds are studying full time (and might be already under a heavy load from student loans).
I also second the notion of a "college night" or any other promotion (sports or scouting uniforms get in free, etc.) that gets young fans hooked. It is a wise investment in the future of the track, and of racing in general.
What the heck, with most kids, if you cut them a break on the admission, you'll make a good bit of it back at the food stands!