Backyard quinceañera for about 90 guests: one unit enough or need two?
We're hosting my niece's quinceañera in our backyard next month. About 90 guests, food under a tent, party runs from mid-afternoon into the evening. The house bathrooms are on the far side through the kitchen, so we want a unit outside by the patio so guests aren't tracking through the house.
The rental quote came back with two standard units and a separate handwash station. My sister thinks one unit is enough for a family party and that the second is padding. Soft drinks and cake, no open bar. Ground by the fence is flat and the truck can pull in from the alley.
Is one unit realistic if people come and go over six hours, or should we just take the two? Also, is the handwash station worth it when people will be eating outdoors, or is sanitizer enough for a family party like this?