It's all peace-tied. I walked in and within 5 minutes was told to peace-tie my sword. I would take what Zlurpo said and then cast them in silicone or rubber-cons tend to allow you to pull your weapon for photo ops, so I would also exchange your bowstring for a good elastic.
The only reason I knew what they were is because they are the same broadheads I hunt with; I recognized them immediately. I knew archery and hunting would help me with costuming one of these days.