If you want to save big on excellent calls, forgo the acrylic calls selling for $100 to $200 and buy a vastly cheaper ($15-$50) polycarbonate or Delrin call.
Waterfowlers love wind. Because birds typically land into it, wind helps to channel ducks and geese in a definitive direction so you can set your spread and hide accordingly. It also moves the decoys, which makes them look more realistic and therefore more likely to fool your quarry.