We bought two of those metal stick in the yard signs
. Fliped the "front-to-front" (flush sides together) and attached two small hinges at the top. In hind sight, we would use a short piano hinge (continuous hinge). For heavy wind, we use sand bags or simply bring it in. The sign is on thin luan plywood, painted (latex exterior high gloss house trim paint... cleans up well)) on both side to hold up to weather. We do need to ad another strap across the bottom of the board (like in the middle) for added support. It will be added to the next sign. I have to make all new signs again. We just buy the precut 2X4 luan and trim it in height.