A lot of guys of course have massive spreads, and with great success.
I have been running 4...FOUR canada decoys this season. (because I've been hunting by myself some days)
You know how right at the first light of morning you see a pair, or just a flock of 4 or 5?
We'll they have to land somewhere, and be the 1st in the field.
I've come home with birds every trip out this season and have had flocks come look at my "4" every time.
That having been said, I'm in an awesome spot, so that helps.
No matter what guys say, don't stay home just cause you only have 18, set em up where the birds want to be and you'll see action.
By the way...I haven't hunted in a week because all my stuff got stolen last thursday