Put all the elements of the outfit on the child at the first Halloween party he attends. Get a picture. With a bedtime of 7:30pm and a high mosquito population, you’re not going to take him trick or treating.
Some people may believe that nothing says Halloween like wasp carcasses, but many of your guests may not agree. Sweep the porch the day before, not at 6pm the same day.
Candy you don’t like is a win. It’s a win-win to open the door for the last trick or treater you’re willing to deal with and giving him everything that’s left. (One win for you, one win for him, no wins for his parents probably but you can’t please everyone.)