I was thinking of buying some goose decoys. In the past, I've just managed to be in the right place at the right time, and took a few geese without even calling. I went on a guided hunt once and the guides had flat decoys, and we didn't see anything all day (except doves, wouldn't you know it).
What's your experience, anyone? What works better, flat or full size decoys? Seems like 3D would be harder to lug around, but less likely to spook the birds.