Aww, that is sad news monstermash! So sorry to hear of your plans going bust. I experienced similar issues with weather. We had a heavy snowstorm, which never happens in October. The ground was cold and snow covered, power lines were down, so the town was without power or heat. Most trick-or-treaters did not venture out. Mother nature isn't a fan of our Halloween.
But don't be disheartened. Even though things might not have gone as we hoped, there is always next year. Hard to think that far ahead now, but as you said, by summer the gears will start spinning and the Halloween passion will take over again.
Not everything goes according to plan, but a big part of the fun is in the brainstorming and building. And I trust you had fun with that process, especially getting to share it with all of us. So hang on to those ideas and props, because they will get plenty of use when the Halloween spirits wish it so.