You can find a map of the houses that will be providing for the trick-or-treaters with allergies. Teal Pumpkin Project which means you will also have Non-Candy options for kids with food allergies, etc.
If you are looking for houses that are providing non-candy items you can refer to the list/map below. While you are out enjoying the sights and sounds of Halloween look for the Teal Pumpkin cut outs posted on houses.
Have a safe and very Happy Halloween!