That looks like a great setup, and you have clearly put a lot of thought into it. I could suggest a few minor tweaks. I prefer to standardize on one battery type, so that my headlight (PT EOS) can become a battery carrier for my LD01 if necessary. You can get a really rugged battery carier for 123s at CountyComm; I would prefer that to plastic wrap. I would consider a lightweight hooded jacket - my current selection is a Patagonia Houdini, weighing all of 4 oz... I would throw in some lengths of small cordage (braided mason's twine) to expand the utility of the heatsheet and poncho in sheltering, and for other purposes.

Do you have any cash stashed away? That could be useful.

I am intrigued by the similarities between your kit and what I have more haphazardly assembled in my work bag - dustmask, work gloves, split pea lighter, early model Wave, etc.

I also acquired and keep handy CountyComm's midsize EOD breaker bar - literally a sharpened prybar. Haven't had to put it to serious use yet.