Catiel Felts, communications director with the City of Gainesville, said last week it has been her experience that when Halloween is on Sunday, trick or treating takes place on the Saturday night before. Hall County spokeswoman Nikki Young said the county hasn't designated which night is the "official" night for trick or treating.
Bottom line...better have enough candy to go around in case trick or treaters show up at your house both nights next weekend.
http://accesswdun.com/article/2010/10/233244