I had a similar story from early in the season.  My dog and I were just pulling away from the launch in my little jon boat, when a guy in his truck pulled up with his fishing boat.  He asked me where I was setting up.  I told him where and he said that's where he loved to fish, but he'd give me plenty of space.  I told him I only had time for a morning hunt anyways, so when he saw me leaving, the spot was all his.  After a swapping a few short stories, I headed out.  I dropped a few mallards that morning without every seeing his boat.  After I packed up, cruising back to the launch, I gave him a friendly wave and he gave me a thumbs up.  He pulled his boat up to mine and thanked me for hunting that morning, because he tried a new spot and slayed the fish.  Birds fell and fish hooked, a good day for both.  Good guy and a respect for each other's sport.