A friend passed along this tail tutorial from Running with Scissors. I modified her pattern a little to make it less dinosaur-y and more alligator-ish. We did have at least one person comment, "Hey! Look at the alligators!", so it was totally worth it.
I also decided to add a strip of clear plastic vinyl to the underside of the tail in hopes of protecting the fabric from the side effects of being dragged through the neighborhood for hours.
Hope you had a happy halloween! Mwaaaahhhhhaahaahaahaa!