I stopped using signs 2 years ago because I got tired of hauling them ring-to-ring and because folks with digital cameras and camera phones were simply taking photos over my shoulder and not purchasing mine.
I do all my signs in PhotoShop. I simply take down the sign info when I take the shot and make the award part of the file name when I send out proofs. Exhibitors can add things like "A Major Win" or "New Champion" and I put them in once the photo is ordered. Simple. And I can put in the club's logo without spending any $$ on signs.
Jim