When I was hunting in Saskatchewan two years ago, we had a hunter having a tough time seeing deer, he actually didn't kill a buck. I think he was the only hunter for the week to go home empty handed. When the guide checked the stand at the end of the week, the hunter had been peeing out of the stand all week. Several guys had done this around the cabin, not even going into the woods a few steps, like 3-5 yards away. I could smell the ammonia smell around the cabin easily. Dumb par is the cabin has plumbing, no reason for this but laziness. Point is, I wonder if once or twice may not cause a problem, especially over the course of a week where the urine doen't build up a strong ammonia smell. But repeated urinating, every day for several days, probably does have a negative effect. For me, on a guided hunt especially with big money invested, I'll carry my urine out and deal with the hassle.