Restroom trailers and portable toilets are both used for temporary outdoor sanitation, but they serve different needs. Portable toilets are basic, low-cost and suitable for high-volume or budget-focused use. Restroom trailers provide a more comfortable experience with flushing toilets, sinks, mirrors, lighting, ventilation and optional climate control. This guide compares the two options for weddings, festivals, construction sites, private events and rental businesses, helping buyers choose the right restroom solution based on comfort, budget, site conditions and guest expectations.