I grew my height early so now I right those wrongs by giving candy to anyone in costume. Also any teenager plus who's escorting smaller children, they get their own candy even if they don't have a bag or a costume and they didn't ask.
I guess that's the answer: if you think you're too old to trick-or-treat, ask to borrow some children. If you have nieces/nephews, I guarantee your siblings would be stoked let you take over.
As the night gets late, it's just teenagers in hoodies who maybe have a mask. That's fine. It's all part of the circle of life, and the correct place for my Life Stage is in being the candy lady.
edit to add: if you take children trick-or-treating, especially if you are not used to multiple sugar-fueled nighttime child-wrangling, put something that lights up on the back of the child, to make it easier to track them in the dark. Light-up pumpkin/ghost/skull pins are easy to find, or just use a glow stick.
