Helping with local car show. Looking for advice/ideas

Hi all, with my new job I have the opportunity to help out and volunteer with a car show.
Its been going for a few years now and has a good following.
Its a one day event and is on Fathers day Sunday.
I know i will have a blast helping in any capacity but anyone got any advice or ideas in all aspects of it? Been to lots but have never helped.
Thanks
Steve
Keep it informal the less rules the better that way less people get their nose out of joint. If there is any judging peoples choice takes the heat off the promoters of the show. The double spacing is also a great idea.