How many flights over 8-10 hours are you doing? Because everyone knows vertrep is the toughest, manliest type of flying known to man.
Honestly, you're in a helo. Stop and take a dump for god's sake.
Without going into too much detail, yes you get out when you stop for gas. But when you're 45 minutes into a 2 hour bag and you get the mcGurgles... that scupper is an absolute necessessity.