RE: Decoys
I tend to stick with smaller set ups. In one area I hunt if it's early part of the season, I usually set 12-24 duck decoys and 3-5 geese. In the latter part I put out no more than a dozen dekes and the goose dekes (3) if the geese are moving through.
At my other spot, IF I set out decoys, it's no more than 6. The ducks are going to come there anyway, so sometimes it's better to just sit and wait!
Now days, people all over are doing the "bigger is better" thing and the birds are getting wise. I can only speak for my area, but small works a lot better.
I don't call a lot either. In fact, I only call when absolutely necessary, ie. trying to turn a bird back around, etc.....