There are lots of strategies to using a true layout boat. Some guys will insert it right into the middle of the rig, some upwind. When we hunted with mine, we always used a "tadpole", (or sperm, as my friend called it), with the mixed puddle and diver decoys, with the tail trailing and trickling off, sometimes 75 yards or more downwind. We then anchored the layout about 5-10 yards upwind, BUT, then, we usually put a dozen or so goose decoys all around the little boat to break it up, while leaving a channel for the tender. I dont recall ever having flaring birds, until it was too late for them. As long as you're targeting divers, at least singles and small groups, they almost always land at the very upwind edge of the spread. Nothing in this whole world is as cool as a single coming across the spread, picking up on the tail, and flying up the "slot" as we called it, feet down, wing tips barely beating, looking to land at the head of the spread.
On a side note, I'm right handed, and my partner was left handed, hence the tadpole configuration. As long as the wind wasn't too strong, up on gunner exchange, we would actually swing the "foot" anchor to the right for me, and to the left for him to angle the boat slightly, for our individual swings. The "foot" anchor was able to be relieved, via a deck cleat, if the wind suddenly changed for safety. We found this quite effective.
Jon