For a weathervane use 2 pieces of knitting yarn tied to the bridle, one on either side. Costs nothing and works well. Some people use cassette tape but I find that it pulls off when trailering the boat. One other item is non-skid material on the side rails, either carpet or what I use which is strips of non-skid bath rubber tape. Also you should have rubber shoes or booties. When out on the wire you want good footing.

Howard