Boy were we wrong about that.
We told him when we got home that if he wanted to he could go out trick-or-treating this evening he could. He spent the next two hours in a state of extreme excitement; he was giggling and squealing and just being ridiculously adorable and happy. At around 6:00 in the evening, just as it was getting dark, Jeremy and Connor the Yeti embarked on their great Neighborhood Trick-or-Treating Adventure!
It lasted all of ten minutes.