Nearly everyone unanimously has said they had VERY few visitors for trick or treat. I did see folks wandering around in the neighborhood when I went back to work at 7:25, but since I had my own lights off, no one came up to the house.
The candy makers had a bonanza sales year, but everyone is going to have to eat vast piles of the candies they had bought to give away...or save it for next year by keeping it in the freezer. Yah, that's the trick.