Actually, if the geese/ducks are locking up on your spread, it sounds like you've almost got it. Maybe get a guide to come with you and observe one day, and ask him/her for suggestions. I'm in south Texas, and when the birds get here they've seen every decoy ever made, heard every call ever blown, and can tell what kind of shotgun you have on their way into the spread. Overall... hard to decoy. Many flocks lock up, look things over, and slide away. That's where craftiness and experimentation become real important. Do things differently - you may hit on something the birds haven't seen.