I like most of it.
Thoughts after reading other people's comments:
More food.
Another hard water bottle. PET can't be trusted IMO.
Another magazine for the Henry, and a cleaning kit.
More stove fuel.
Trowel.
Ziplock bags and a couple of contractor's bags.

Given that you are looking at a full range of options, CASH. And rather than just copies of your documents, keep some of them in here, like an old DL.
Thanks for the good input.
I thought about more food. I know what my appetite is when hiking high mileage days. One MRE is one day's food for me. The lifeboat rations will do for three more, at least, and my odds and ends will go a day or two. I could stretch my supplies into a week. One problem is the tropical heat from carrying food in my car's truck, and the hassle/expense of rotating stuff out.
I have high confidence in the Camelback bladder in it's protected sleeve pocket. The OTS water bottles, which get rotated out regularly, will get dumped into that. The Nalgene Lexan bottle is full. That gives me a full gallon without using the 2 gallon water bag, or the PET Bottles.
The Henry holds 2 8 rd magazines, and I do pack an all caliber cleaning kit. i haven't looked into after-market magazines.
I could probably use more fuel, but there's always an option for a cook fire. Depending on my end weight, I think I'll add another fuel bottle.
I do have a plastic backpacker's trowel.
There are some zip locks or small dry bags holding stuff, as well as a dry bag liner for the pack, but more is always useful. I do have one large contractor-type bag.
I always have cash on hand, and have to carry essential emergency credentials at all times, too. You are right about these.
Jeff