My strategy: don't go during the breaks. The lines are too long and there are better things you can spend your tourney break on. One I know every exit and the closest bathroom, I gauge the speed of play and look for a spot UTG+ 2 or +3 that will allow me a mad dash to the bathroom and back in time for my big blind. Is this the optimum strategy? Probably not. So give me your GTO bathroom break.