Hunted the SE zone opener at a marsh I had scouted. Avoiding the pandemonium in the morning, I was set up by 1:30PM. A greenhead came right into the decoys within 10 minutes. Several singles and doubles of greenwing teal buzzed me and I bagged one, but action slowed. At about 2:30, four guys arrived and set up about 150 yds downwind from me on the bank of the dike (a no no I think). I had scouted this marsh twice before, so I knew where the ducks wanted to be and was going to move anyway. I set up to these notheads' southeast farther out in the marsh and limited out while they never fired a shot. Filled my limit with a double on two beutiful greenwing drakes. As I was trudging back to my car, that foursome was moving to where I had been. I had been the only one there until they showed up and pi##ed me off. All's well that ends well.