Pumpkin in a lace stocking. I've planted a bunch of mini white pumpkins. White lace stockings on them might be a nice outdoorsy Autumn touch. Inexpensive and kinda unexpected. These might be cute on the outside tables under the arbor too.
Black Tack Pumpkins OR puff paint! I don't like the swirls (it isn't scary at all!) but maybe I could use white puff paint (even better if it were silver glittery too) to draw on a spider web and attach one of those little spider rings.
Candy Corn Cupcakes - This is my new go-to recipe for white cake and vanilla frosting. Bakery quality in the best way. My only change was to sub of the butter in the frosting for shortening because I ran out, but I think that made the texture even better.
get 2 brown paper bags and cut to desired height. Cut one bag into strips (all sides but the bottom). Put treat in uncut bag, then wrap cut bag around that. use a carmel apple for the treat and have the stick in the apple double as the broom stick.
Spray-paint the rind a matte black and let dry. Use a spoon handle to scratch away paint to create stars, moons, and spirals. Add water and blooms. (via Pumpkin Decorating - No Carve Pumpkin Decorating Ideas - Good Housekeeping )