watever u do, dont use the bass guys as the dj, omg, the classic car guys will leave, alot of people will, if anything, devide the sub guys to another area, so it dont piss people off, and make sure local cops wont bust them for area laws, like out here, tickets are given if they hear your system over 75 feet away, but haha, i never got one......yet. you will need a dj, with muli-genre music taste, and knows what that specific crowd will like, and school food, no one likes that, talk to some people out there, chain food dont work, instead, try smaller local resteraunts, 50/50 raffles are common, try that, and have lots of people going around selling, not just one. shaded area is good, bathrooms are covered, and make sure that your school will go through, not having to cancel cuz it rained on they football game and continued or something, make sure u have every possible thing covered. and remember, kids ill be there too, besides the cars, have something there for them too. good luck.
i tried doing this one time, it was too much of a pain in the A$$