Just do it, I try to go away from where im hunting if i gotta pee, but if it cant wait i ler er fly.
I remember an old Nugent video where he joked about drinking nothing but apple juice for weeks before the season and then peeing out of your stand. Then all the deer will smell apples and come running and while they are licking up your pee you whack em. It was kinda funny when i saw it.