One of the great secrets, and a means of telling who really has done a bunch of this stuff in the past, is the toilet paper load out. When I was working the private sector and contracting stuff I not only always had a roll of TP in my bag, but a pack of baby wipes. Often, you are having to use porta-potties or anything you can find for a bathroom, and most are ill equipped for proper clean up. Add to that questionable food sources and it is a combo issue. I have gotten various varieties of food poisoning and bad stomach issues on details and the reality is that nobody gives a crap about your crap issues. REAL load out stuff has several concoctions for traditional illness and stomach ailments plus aches and pains and boo boo fixes. Nighttime Thera Flu has saved my ass more times than another thirty round magazine has on critical stuff.