Not sure if there is a Passholder's pin but there should be a pin pursuit with a different pin available at each park as well as the resorts and Downtown Disney. It is usually a lot of fun running from park to park trying to find the pins and seeing which character is where. I highly recommend it. I did the pursuit a couple of years ago on the only Halloween trip I've ever made and had a blast. I even did it using only Disney transportation which was even more challenging trying to find buses going from resorts to parks to DTD. In the end though I found them all. Now I just have to go and frame them.
So I'm curious, what happens when the Disney Queen meets the Burger King? Is there a royal courtship?
Jeff