A trailer with interchangeable cargo specific pods positionable into alignment with a flatbed of the trailer and including fasteners in vertical alignment with fasteners of the trailer. The cargo specific pods may carry cargo such as bicycles, kayaks, canoes, skis, sailboats, skidoos, luggage, seadoos, surfboards, livestock, scoreboards, advertising panels, rowing sculls, contractor's equipment, camping units, and camper trailer pods. One or more pods may be placed on the flatbed at a time for transport by the trailer. One cargo pod includes doors to allow for easy access to cargo. A bicycle pod includes an arrangement of inclined grooved supports for receiving bicycle tires. Sets of hooks may be staggered in height from highest to lowest. Each grooved support includes a hook for hooking about a bicycle tire. A watercraft pod comprises a ladder assembly having opposing ladder towers, each tower including at least one support formed from a rung which pairs with an opposing rung. The ladder towers are supported by an adjustable brace assembly.