I'm working on a Halloween (Okay, I'm always working on a project, no big deal) for myself and some dA friends. The top sketch is a very generalized layout of what the image may be. I'm not sure about everyone else, the only thing set is me as a lead in placement. Expect some sketches of the other participants as I work out the details of costumes and such.
I like the idea of a magical pumpkin patch, where the pumpkins are "pre-carved" and whatever is carved on it is what the "prize" is. Could be a witch's cat or broom, a ghost, candy, or whatever you want. Got to be careful with what you get, some are more pleasant than others.