That's the truth. I've never seen a candid photo or reel that has everyone in "proper" attire. One vet I talked to was saying that most of the guys in his crew worked in sandals, undershorts, and if they were on the deck, a hat. He said that when it got really hot, they would take their towels and wash rags and put a belt around them to wear them like a skirt or loin cloth. I've heard of the mosquito boat guys doing the loin cloth thing too.
I'm not thinking the public would be much into seeing us wearing loin cloths so I may forego that one.
That's where living history reaches the thin line. You have to do your best to be accurate but can only do things so accurately without a lawsuit. One of the greatest tests of a living history group's ability is to take a b/w picture of them with a period 35mm camera and mix it in with a bunch of real photographs and see if you can pass yours off as an original.
Case in point. See if you can tell which of these photographs were taken at a living history event and which were not.