Outdoor wedding: does a restroom trailer need power and water at the venue?

Yes, a restroom trailer needs both electrical power and a fresh water source at the venue. It does not run on its own battery or tank water for the event duration. The delivery crew will need you to provide a standard 110V outlet (dedicated circuit, no extension cords over 25 feet) and a garden hose bib with potable water pressure. They do not need a sewer connection; the waste is stored in an onboard holding tank and pumped out by a vacuum truck after the event, just like a standard portable toilet.

For your 90-guest wedding, a two-stall unit is sufficient based on the event planning guideline (about one unit per 50-75 people for a four-hour event). Place the trailer on level ground within 80 feet of the house, the crew will handle placement but need clear access for the truck. On delivery day, have the power and water ready; they’ll connect everything and test it. I’ve done this for weddings: running a heavy-duty outdoor extension cord and a drinking-water-safe hose is fine, just secure them to avoid trip hazards.

Nina is correct about the hookups, but I'll add that some restroom trailers have an onboard fresh water tank and battery as a backup. You still need to confirm with your specific rental company if their model requires continuous hookups or can run on its own reserves for the event's duration. The delivery crew will need to verify the level ground for placement and ensure the truck access is clear for both delivery and the post-event pump-out. For 90 guests, a two-stall unit fits the event guideline, but if your wedding is longer than four hours or includes a bar, consider discussing the capacity with the rental operator.