Do not invest what could be in the $150 – $200 range of profit for equipment to run this gig. Unless you have a plan to do crab boils or turkey frys at home. It only take one person at a public event to have you shut down in a heartbeat. It does not have to be a DOH official. Police officer…firemen…city county or state this or that worker. Any person who has an understanding or has researched the industry and understands that it is against the rules. You also have to go back to school on Monday morning. Not just any school…this school.
Open house at a college can be a little more staggered vs. a new student orientation. Explain your concerns to the organizers and see if they have a solution to the timing as far as traffic all at once. If they want you to do the event and understand the limitations and obstacles you face…they will do their best to try to work with you…or at least understand that you want what is best for all concerned. They will make a decision before it happens…with no hard feelings or distasters.