November 2026 wedding: 120 guests, indoor venue, 5 hours. Units?

We're getting married indoors in November 2026 at a venue that has no restrooms on site. The guest list is 120 people, and the event will run about 5 hours. No alcohol will be served, but we are having a catered dinner. The venue has a gravel lot where the rental company said they can place the units, and a truck can drive right up to the spot. I'm trying to decide between standard units and maybe a deluxe unit or two for the wedding party. How many portable toilets should I rent for this size group and duration? Should I include an ADA-compliant unit even though it's a private event?