What state are you in?
Have you scouted the area to see if the ducks are using it?
Beaver Ponds and Swamps in PA are "Da Ticket" for Ducks!
I'd hunt a Beaver Pond or Swamp anyday over lakes or rivers.
Bad thing about these 2 is, you have to watch were you step! You could end up over the waders in no time or get stuck in the uderlieing mud!
Most every Swamp or Beaver pond I have hunted here in PA holds Woodies and Mallards.
Every once in awhile we will get Blacks and Gadwalls in these areas.
Every Beaver Pond or Swamp I have found has a TON of feed in it which Equals a BIG MAGNET for Ducks!
We do not use many decoys, maybe a dozen, early in the season, 8-10 woodies and the rest mallards, as it gets colder, we switch to mostly mallards with a few odd balls thrown in.
We hunt the edge of these areas.
I have talked to guys from the Northern part of the state and in New York State, they have Geese using their Swamps and Beaver Ponds. Not the Case in my area, just ducks.
If you can, Do some planting in these areas if they do not hold any feed.
Swamps and Beaver Ponds, I LOVE! Seems atleast in my area, guys don't like to even try to get into them!
Our youth are the Back Bone to hunting of the Future. Teach them WELL!