The Halloween fairy comes late at night on October 31st, after all the candy has been collected, the costumes removed, and excited but exhausted children are in bed. If you want her to stop at your house, you need to choose some candy to keep, and some to put out for her. Just as the tooth fairy exchanges a lost tooth for a special treat, the Halloween fairy leaves healthy alternatives when she takes away the excess candy. Our fairy was great about leaving us mangoes, kiwi fruit, pineapple... she knew just exactly what our favorite fruits were! My boys weren't too impressed with the hard candies- or for that matter the non-chocolate candies - in their Halloween loot stashes, so those always went out for the fairy. When they were very little, they chose 10 pieces of candy to keep, and put the rest out. (We also only went to a few houses.) Later we kept more, and eventually, just like the tooth fairy, the boys outgrew the Halloween fairy.
On a cautionary note, a friend once asked me what the Halloween fairy does with the candy she collects. The sad truth, as I told my friend, is that mostly she stores it on her thighs. :-) Some got shared in various ways, but... well... butt.
Wishing you a delicious, but also healthy, Halloween!