Other thanpossession ofswitch blade and "gravity" knives, I don't believe there is anything in the statutes regarding carrying knives. However many local municipalities have their own ordinances. I think Milwaukee, for instance, is one of MANY places that have restrictions on blade length. A lot of places prohibit double edged knives. Madison, where I live, doesn't have anything about length of blades on the books, but they prohibit possession ofa number of martial arts weapons. Obviously some stupid ordinances passed during the heyday of "kung fu" movies in the 70's. So I'm afraid you're faced with a patchwork of local laws that you need to research in order to comply with the local ordinances. I wouldn't think that if you're attending a reenactment you'd be charged, but you never know!