Get youth groups involved at the tracks. The track I grew up at used cub and boy scouts to oversee parking for fans. Lucus oil in wheatland used groups like the local HS band members to sell 50-50 tickets and supports the band in return. The local semi pro baseball team often invites local grade school / junior High choirs sing the national anthem and lets them and their parents in that night for free. Sometimes they invite the local youth dance team to perform right before the game as well. Have grudge races on go-karts on the front stretch at intermission for maybe 4 high schools each week and rotate the schools and reps from each. If we still had shop and auto classes in the schools, I would start a high school class of front wheel drives but not sure how that would work these days.