I guess in the South its a little different than where you guys are- anything thats attached to my bow that has to "blow" in the wind will usually end up wet from dew on grass weeds or other stuff it encounters.
Things I would keep in plastic bags means I have to make a series of motions to open, withdraw, and then spread the items you're talking about like milkweed.
Add to that the fact that here, where its very flat, the wind is CONSTANTLY changing and that means I use my puffer constantly- much like when I elk hunt out West....a puffer bottle I can pull from my vest pocket, snick the top with my thumb and squeeze so I see whats happening, all while still holding onto my bow with my left hand is indispensible.
As long as its dry that wind feather is great because you don't have to DO anything. Good stuff.