RE: duck and goose fields
The spinning wing decoys work like a magnet for ducks that come in first. But if you're decoying geese as well, I'd suggest that after the ducks are about done, take the spinners down. Our experience is that for some reason, geese are shy of them. We also only use goose flags to get their attention from a distance, once they turn and start toward us, we flag very little and just call. Let the calling a decoys on the ground bring them in the rest of the way.