It's all circumstantial. When I deployed I was still field artillery without a field artillery mission. So we would run our missions every day and then return to base. So I didn't need to rough it but for a handful of 48 hour ops where we stayed out and came back in after two days. I just stayed up the two days and would crash when we came back.
In terms of pure physical discomfort after I reclassed to 12B my rotations to NTC and JRTC were worse. Because I "lived" through both of them and it was hot and we were still running route clearance packages for NTC and got attached to the infantry at JRTC where we lived with our trucks and on the ground. In the 2nd instance baby wipes also work as adult wipes, but also help get the dust and grime off of you. They now make field wipes that I'd take to every field rotation we did.
Every kind of creature comfort that you can be afforded all depends on command (you might have them but they deem them unnecessary), location (if your in the middle of nowhere there is zero chance your getting them), unit relationships (our leadership with the sapper company WOULD ALWAYS rub people the wrong way and we would get left out of alot of amenities that the other units were getting) and what the enemy was doing. Both real and fake. JRTC the badguys would target water and food transports and if they were successful in hitting them then you would be hungry and thirsty.
Its even worse in reality with support units who are totally risk averse. We didn't get resupplied for the last month we were in Ethiopia because they thought Al Shabaab would target the convoy in. I had alot of blueberry poptarts in those days because it was the only thing left to eat.
So in short pack all the creature comforts you can. Snacks, hygiene items, and snivel gear.
Eventually though you will have to have water to rinse off with, but thats like two weeks. Your sweat will crystalize in between your skin and clothes and start to irritate you pretty badly. It looks like a heat rash but it is actually your clothes stabbing you.
