I like Mr. Sanford's style in this as in most things. Since I could never muster it, nor the ability to be cheerful while being ranted at, my general approach is to hunt spots as remote as possible and when that's not possible always have a Plan B in mind in case someone has the same Plan A and gets there before me.
My most egregious personal sin in such an encounter may be instructive. My normal home wood duck hole is a ~1/2 mile walk to a small pond where I keep a canoe. I tend to avoid it on opening days and weekends when there might be another party or two on it, although it's plenty big to support 2 parties and big enough for three if they think about how to spread out.
On this morning I expected no such competition, found nobody else parked at the access trail, and saw no other lights on the far side of the pond where another trail comes down to the shore. But halfway across the pond on my paddle--in the dark, as there was a little moon and the stars were bright--my eyes were stabbed by the flash of a neon light (apologies to Paul Simon) that split the night. It was a big side by side ATV with blinding lights on the front end, parked at water's edge not far from where I intended to sit. The lights stayed on as the two occupants set their decoys in the blazing light. It was literally strip-mall parking lot bright on their end of the pond.
As I said, the pond is big enough for two, so I altered course towards my Plan B spot. I was a little late getting there, and by the time I set 3 woodies and 4 black ducks and hid the canoe and got my face mask on it was pretty close to legal shooting and the other party had turned off the light-of-ten-thousand-suns and were sitting behind a quick brush blind. (They had not moved the side by side next to the pond edge. Perhaps they thought, since it had a nice shiny woodland camo paint job, the ducks would assume it was a small cubist clump of trees in the middle of the cattail marsh.) I unfolded my little stool and sat down and reached into the canoe for the gun case--and realized that I had left it back on shore when I launched the canoe.
So, not wanting to be "that guy" and be out in the middle paddling back for my forgotten gear just as the ducks started to fly, I resolved to sit where I was, let the ducks work to the other party, and wait until they were picking up birds before I ventured across.
For the next 30 minutes wood ducks, along with a few teal and 2 solo black ducks, just poured into my decoy spread. Most of them circled the pond on their way in, passing high over the other party, and landed within 25 feet of where I was sitting. At one point there were over a dozen birds down on the water around my decoys--the biggest group of wood ducks I have ever had in the spread. Not one of them had given even a passing look at the other decoy spread. Every once in a while I'd stand up to take a look and scare them all off, hoping that one or two might stray into the other decoys and give me cover to boogie over and get my gun. No such luck. After more than an hour, as the birds kept ignoring them and coming to me--the mysterious duck hunter who never bothered to shoot--they finally packed up and left. At that point I figured the flight was pretty much over, so I picked up my decoys to do the same.
As I landed across the pond, still standing on shore, the duck flights resumed, and this time they were settling down about 50 yards down the shore from me. I grabbed the shotgun from where I'd left it, along with two wood duck decoys, and walked down the shore to the spot, putting up the 4 woodies who had settled in. I tossed out my two dekes, sat on a stump surrounded by alders, and put three shells in the gun. The four ducks circled the pond, swung over my head, and on the second pass two of them dropped in. I took one of the pair and was contemplating a going away shot at the other when I saw that the two that didn't land were still circling. So I sat back down, let them work, and took a second on the next pass.
I asked around among my neighbors and duck buddies--I usually know anyone else who is hunting in there--and I never got any intel on who the other party might have been. If I could have found out who it was I would have introduced myself, apologized, and invited them to come back with me some time. Alas, I never found out. I suspect that somewhere they are still ranting about the anti-hunter with magic decoys who broke the hunter-harassment laws to ruin their duck hunt that day.
First time I had ever hunted either of those spots on that pond. They have now become my go-to Plan A and Plan B.