500-person brewery festival, 6 hours: how many porta potties?
I'm planning a craft beer festival for 500 attendees this June. It runs from noon to 6 PM on a Saturday on a grassy field at a local brewery. We'll have multiple beer tents pouring craft brews and several food vendors. The ground is level, and a vacuum truck can drive right up to the placement area. I'm deciding between renting standard units or upgrading to a restroom trailer for a better guest experience. With alcohol involved and a six-hour duration, I know I need more units than a basic guideline. How many portable toilets should I order, and what's the right mix of standard, deluxe, and ADA-compliant units for this crowd?