Depends on the competition. Are there other ducks working into other spots close by? If so, you need to make your spread stand out. Agree with the goose deke suggestion. Or, if you really have a wild hair, throw out 6 coots and a couple of drake pintails. Just whistle a few times. I've also seen a heron confidence decoy a few yards away from a regular 6 or 8 puddler dekes. Or, just hope yours is the last spot to freeze...then decoys don't matter!