I was put in charge of setting up an event at Kings Island, where our group would volunteer at the park for two days and possibly get a day of free admission, it get even more complicated b/c I was told this event would involve camping at the park (Not naming the organization I'm a part of but it involves a certain youth program). So with an event that involves an overnight stay, Volunteer service, the possiblity of free admission for a day, and good PR for Kings Island, who in the heck do I contact at the park to try and discuss the possibilites of an event like this?

Call the general park number, and they will be able to direct you with who you need to speak to.