1) I don't celebrate it, my kids just get candy from the neighbors.
2) If you go there, then we have to dump Easter, May Day, Christmas, and almost every other holiday over the side of the boat as well. The pagans were wrong, but they were here first. (Not before Christ, of course, but before the modern church.)
I love Halloween and Christmas Trees!
I let my kids dress up and have fun fun fun. That’s what I did when I was a kid. It is for fun fun fun. Something you will remember when you are a boring old adult!