Simo, I can only report what I've observed or heard from friends who hunt them. All of the decoy spreads I've used or seen (both large and small) will draw the birds for a high fly over but not really pull the birds down, with one exception. I watched a guy who had 8 mounted Aleutian geese that he used for decoys pull the birds right down. He was hiding next to an old water trough. No doubt he was in a field that the birds were wanting to use, but it sure worked.
I had one good shoot last year with a dozen decoys. I painted the white neck collar on them. It was real windy and I was the only one on the place that day. Even then they weren't really setting their wings to land. The wind just brought them down lower.
I was hoping to get enough birds this year to preserve some for decoys. You know they are the right color and size.
One thing that does not work, from what I've seen, is the layout blinds. The geese avoid those like the plague. A fence line, or existing structure of some kind is a lot better place to hide.
There are a few ranchers who see the value of hunting and actually manage for it. They will let the birds use the property and only hunt on a limited basis to keep the birds around. Most ranchers will immediatly run birds off as soon as they see them. The birds will leave and not come back which makes for lousy hunting. I can't blame the ranchers though for running them off as they will reek havoc on the grass.
The funny thing is, about three days after the season closes the birds know it and land where ever they want. The ranchers really take a beating until they head north, about the 1st to the 15th of April.
I've actually gone out to the ranch I hunt and had birds sitting down when I got there. The rancher wasn't home at the time otherwise he would have stepped out the door and shot to spook them away. A couple times the birds were close enough to good cover and I was able to sneak on them. That's always fun.
Eel