When is a trailer better than a row of single units?
A trailer fits when the crowd is large, the day is long, the guests are dressed up or the site has room for it. Rows of single units still suit most work sites and short events. Many big events use both: a trailer for a main area and cabins spread along the route.
Think about the guest's experience. A flush toilet with a sink and a mirror is a very different thing for a person in a dress or a suit from a cabin at the end of a muddy path. For a wedding or a gala it is often the deciding factor.
Think too about the scale. The Philadelphia Marathon draws about 37,000 participants over the weekend, and the porta potties at Eakins Oval, near the Art Museum finish, are usually mobbed. A finish area at that scale is where organizers weigh trailers against rows of cabins.
What do Philadelphia crowds tell us about demand?
Philadelphia's biggest days strain supply. After the Eagles Super Bowl parade, 850 port-a-potties on Broad Street and the Parkway served an estimated 2 million visitors, about 2,350 people per toilet, and limited rentals were blamed on short lead time. The city had rented about 3,000 for the Pope Francis visit.
Those figures are from news coverage, and the parade year is not stated here. What matters for a renter is the pattern: demand arrives on a few days a year, and every provider is asked at once.
A restroom trailer is one of the ways large organizers add capacity without adding forty cabins to a crowded street. Read the event toilet guide for the longer discussion.
Where do stadium and concert crowds use trailers?
Where a large crowd gathers on open ground for a few hours. Camden's Freedom Mortgage Pavilion holds 25,488 and hosts about 40 headline acts and festivals a year. Subaru Park in Chester holds 18,500 for soccer and 26,000 for concerts. The South Philadelphia Sports Complex has tailgating at every event.
A venue usually has its own restrooms. What a rented trailer helps with is the surrounding ground: a tailgate lot, a festival area on a fan plaza, a staging area for vendors. The stadium-area page explains that kind of rental.
Tailgating is not permitted in lots north of Pattison Avenue and west of Darien Street at the Sports Complex, which is a reminder that where a trailer can stand depends on who controls the lot. Ask the lot's operator first.
What does a trailer need from the site?
A firm, level spot big enough for the trailer and its approach, a clear route for the tow vehicle and, depending on the model, a water supply, power and a way to drain. Ask the provider what their model needs, and tell them what the site has when you book.
In central Philadelphia, narrow streets and gridiron blocks leave little room, so the route in matters. A tow vehicle with a trailer cannot turn the corner a delivery van can. Closed routes and event barriers can block the path the provider planned to use.
On a park or a field, soft ground after rain is the problem. The provider knows how its trailers behave on lawn, and may recommend a different spot or a firmer path. Do not wait until the morning to learn that the truck cannot reach the site.