Consider that this featured woman hunter is simply very image-conscious.
It's not beyond imagination that she would lay a windbreaker down before laying prone, nor is it out of the question that she would request of her guide to brace her for the shot.
She's very nice looking and I can imagine she'd carry a hairbrush and compact makeup kit on a hunt.
Freakin look at her guys!

I know many women who have the stones to get out in rough country and the vanity to maintain unusually high standards of appearance while in the wild, some of them wealthy enough to commission trophy hunts too.

I could give a pinch of snot one way or the other, but do recognise the tendency of a remarkably nice looking woman to groom herself before the taking of a trophy photo - of any particular type of game - it only takes her a moment to check for smudged makeup and brush her hair.
Even at elevation and in the wild.

--Tinker