When I was a kid in the early sixties, Ga was somewhat more in the "media" (talking now televisions shows, etc.) and seen as a cool thing to do.
I still remember watching (though not how they filled up a weekly show with it) "Sky King"...etc.
One thing I've been noticing lately. More and more "reality" shows about flying. Commercial, but small planes like in Alaska, Afrika, and south america (at least three different series. The Alaska one is actually pretty good). It would be great if they did a reality show about student pilots getting their training.
One other thing, it seems from comments and my own experiences, with the security situation in larger airports, the general public often seem to not know they can drive on out to a local airport, watch planes take off and land, look at the planes, talk with folk, hang around. Some kind of outreach, plus "come on in" type of signs at the airport gates might do a lot to generate interest, and possibly new students.
I know at my airport, it is partially military use also, the signs out front could seem to be saying "military area, keep out", I've mentioned this to some in charge at the airport (as they are trying to stave off it being closed and turned into apartment housing, with a climbing wall) that it ought to be welcoming as the military area section is off to the right, the GA area is open to all.