A stacking base system for transporting to a work site supports a plurality of vertical posts. Each of a plurality of base members defines a fill port and includes a port plug adapted to be removably inserted in the fill port, and defines a post aperture, shaped to correspond to a cross-section of the posts, extending downward through the base member. Three legs extend down from outer edges each base member, and are equally spaced around the base member, and substantially equally spaced from the post aperture. The post aperture is oriented vertically when bottom ends of the legs are resting on a horizontal surface. The base members are stacked such that a top portion of a lower base member engages a bottom portion of a next adjacent upper base member and such that the plurality of base members forms a base stack.