Well, I still feel crappy, but my friend TR came over and helped me wrangle Cooper for the parade, so we went. It was a beautiful day for it, and Coop had a good time.
He had no interest in putting the hood of his costume on, which was a T-Rex costume, until the parade actually began. Apparently he is not interested in dress rehearsals, just let him know when the performance is about to begin.
The parade starts about half way into our neighborhood, and then we all walk to the bottom of the neighborhood to the park. Other than all the older kids who seemed intent on going all ninja on everyone, it was a good time.