You'll never get anywhere using chicks and day glo.
People want tan. Next time, halftone a mastodon and maybe put it upside down cropped from like the top left corner. Tan French Paper...something in a speckletone. Then make some sort of tiny crest with all the show info. Repeat it a couple times, but it still has to be small, but that's ok because your poster will be so inviting to the viewer that they just have to take a closer look.