Where does everything go when you are in transit? There will be some equipment, like awning poles and canvas, freestanding kiosks and furniture, stairs and rails that will have to be stored for transit. They can go under the floor, in belly boxes, between the roof and ceiling or tied down to the center section of the main floor.
You will be provided a drawing showing where everything will fit for storage. Make sure this is thought through ahead of time during the design stage.
If you have more equipment than will fit in the trailer, you'll need another vehicle to haul it, i.e., a chase truck. If you need a chase truck or need to change your design to avoid needing a chase truck, it's best to know that up front.