A modular multiple mobility base assembly apparatus is described for transporting an item being shipped having a base adapter plate and two cooperating and coordinating modular mobility bases that are each coupled to the bottom of the base adapter plate and collectively support the base adapter plate. One of the modular mobility bases operations a master autonomous mobile vehicle, while the other operates as a slave autonomous mobile vehicle that receives propulsion and steering control signals from the master while providing feedback sensor data to the master for use in coordinated and cooperative movement of the assembly apparatus. Each of the modular mobility bases also including respective wireless transceivers through which at least the control signals and sensor data are provided between mobility base units.