A small camp or temporary accommodation area may need both showers and restrooms in one location. This nominal 13ft trailer combines those functions within three individual stalls, with hot and cold water service.
The important choice is how those stalls will be used. A person taking a shower also occupies that restroom space, so bring the busiest shower period and ordinary bathroom demand into the same conversation.
Use the morning routine to choose the model
Describe who arrives together, how long showers are expected to take, and when cleaning happens. That is a more useful starting point for three stalls than a daily attendance figure on its own.
Count the space around the trailer
The 13ft designation is nominal trailer length. Entries, connections, maintenance, and servicing need additional room. Check the assigned electrical requirements and water and wastewater arrangements against the intended position.