So in the case of a natural disaster like this, the kids lose out on Halloween on top of the upheaval of the disaster?
Yes, basically. You can do a lot of things to celebrate it outside of trick or treating. Carve a pumpkin, make decorations and decorate the house, make cookies, dress up and walk around the house or the neighborhood or stores. I was even thinking of trick or treating at our house (she would go room to room with a flashlight and I would give her candy in each room) but it looks like trick or treating is a go here as the weather is going to be okay tomorrow and destruction not too bad (southern Maryland).
(Frankly, I don't consider Halloween THAT big of a deal, at least emotionally. To me it isn't really a family holiday like Thanksgiving or Christmas so "missing" it would be a drag but not a huge emotional loss either. Kids adapt well and take their cues from their parents about these things too.)
But anyway, yes to your question. I would not like to participate in a postponed Halloween trick or treating even because I consider trick or treating legit only on the one day. Kind of like when people shoot off fireworks on July 3rd or July 5th--that is just wrong.
I know I sound very rigid and, in reality, if ever confronted with the situation, I probably WOULD go along--but mentally, I'd be protesting.
The idea of towns/people actually scheduling trick or treating to be any day other than the 31st (for no reason at all) is just beyond the pale.