RE: Few questions on decoy setup
I would set up any place where you have seen ducks in the past. Be where they want to be, do some scouting if possible. 4-5 ft. is a very narrow body of water in most cases ducks seem to avoid streams that small, I'd be curious on how the hunt turns out. Around here I have seen ducks on small streams but they have been 6 yds or larger.