I think you are both right the old pilgrim fathers look works definitely , i love the idea of a noose and like you mentioned about bruises on the wrist some on the neck could look good , a good idea for small items to add authenticity could include historically correct folklore items , not sure if you have the same belief in the U.S. but in the U.K. a small stone or pebble with a hole in it is called a witch stone and was given as good luck , or a small group of these stones on a string hung near the entrance to the house or near the house would apparently protect it from witches , i will try and see if there's any other local folklore stuff in my part of southern England related to witches or witchcraft may be of use for your costume .