Pip, that's what I have to do this year, because I'm not going to be home on Saturday.
My building has a party for all the kids in the lobby (lots of families in my building), and then if you want the kids to come trick-or-treating you put your name on a list.
I sign up every year but totally forgot that I'm not going to be home. So, I'm leaving a bowl of candy out. I guess I have to go with the honor system. Not much else I can do.
My only other thought, although it might be too late to organize, was to not have candy out, but donate a bunch of cupcakes or something festive to the 'lobby' party...
Either way - I hate to miss seeing the children.
"Two drifters off to see the world. There's such a lot of world to see. . ."