The provisions of any other law or the provisions of any administrative rule, regulation, or order to the contrary notwithstanding, it shall be lawful to tow cotton wagons and module-movers on the highways of the state when the wagons or module-movers are being used to haul cotton from the field to the gin and to return them to the farm from the gin, but it shall not be lawful to tow the cotton wagons on any interstate or limited-access highway in the state; provided, that no more than two wagons shall be attached to one truck, the width of each wagon or module-mover shall not exceed 10 feet, and the overall length of the wagons or module-mover and truck shall not exceed 85 feet.