Well there's always using bits of yardage as "table cloths". Turn under the edges and press "hems" in the fabric and secure with a concealed safety pin every now and then. As long as you have more than enough fabric this will work for any size "table" that your display sets on. A sprinkling of garnish (wild grapevines) and a dash of color (faux daisies in a vase or crock) would also add color and texture to the area.