Maybe not pertinent to what you are doing, but when I ran the actual maze from chapter two of Age of Worms, I used several dozen 1 inch squares for the walls and then kenku and other creatures hunted the party. Since I had a limited amount of squares, as the party adventured forth, I would remove the earliest squares they encountered to create the new areas. It actually made at least one of the players extremely nervous not being able to see the entire map and having it shift on him.