Cool weather, I don't worry about it one bit. However, in warm climates (early season) it sure can broadcast some scent.
(Although it does take some "acrobatics" to pee from a saddle. ~ Which complicates things for me.)
PS: Years ago, I once had two moose come in, and lie down almost directly right under my stand. I "held it at long as I could" but eventually had to relieve myself. I suspected all heck to break loose as I put my bow down, stood up & peed right in front of the moose's head. ( I literally could have peed on the cows head had I chosen to!) ~ To my surprise, the moose just looked around dazed & confused. I was actually able to sit back down, put my gloves back on & grab my bow (resting in a limb) without spooking the two moose. Fifteen minutes later, they got up and "casually" wandered away. I was amazed they never looked up. I honestly think they thought it was rain! (The whole incident made me realize how "stupid" moose can be!) ~ I kept imagining what would have happened, had I tried this with a couple of does instead!