A few ideas off the top of my head, anything with Bib overalls (also easy for any pregnant ladies you may have). Consider having a few of the "organizers" dress up as fairy tale characters (Little Miss Muffet, Dorothy from Oz, you get the idea). Also, "kiddie dress attire" - pajamas (with feet) or nightgowns; any "t-shirt and jeans" covered w/ paint, play-dough, whatever; beanie caps....okay, I admit I'm out of ideas, but I'll be back with more later.

These are fantastic - thank you!!! I'm sure your ideas will inspire many others from our volunteers.

Pigtails. How about a nerd with taped glasses and flood pants. Greased hair. Blacked out tooth. There is always the Tooth fairy, Santa, Easter Bunny etc.