It's hard for me to think of a field of human endeavor where I would be patient with someone who wasn't willing to have his or her work checked. Where lives are on the line, like in climbing and aviation, a bad attitude about that would lead me to not participating.

AMEN!

Unfortunately that bad attitude is very common. That attitude is fostered by some supervisors. I once had the pleasure of a talk with a supervisor for picking on a colleague when testing software. Somehow the bugs were the tester´s fault and it was not OK to point them out. We finally agreed that the colleague would no longer select me as a tester. That measure improved the project´s quality statistics.
I managed to get assigned to other projects.
I think not putting lives into the hands of people who do not like their work checked is wise. Their performance often leaves a lot to be desired.

I quit a job over something like that once.

...and in case everything goes South, leave a detailed note to where you're going

When the company started deploying Microsoft Office 2010 I documented several major bugs and reported them back. A few days later I got a nasty e-mail back that where mine had been sent up through several management levels and I was told that there is not way it could have these problems when it had been tested by Microsoft and the company. I had the helpdesk roll me back to MS Office 2007 and used it for another year and then later found all my reported bugs and fixes listed in the first service pack for 2010.

Your more likely to suffer from a car accident or house fire than EMP or such anyway.
Keeping up with the day to day computer backups, keeping important papers in the safe, keep car keys with you, etc will be your preps.

Better yet, tell someone responsible where you're going, when you plan to return, what your route is, when to call in the Calvary, etc. Pieces of paper have a sneaky habit of going missing or unobserved in a timely manner.

The complete answer is - Leave the detailed piece of paper with someone responsible and a time for when they should use it to call in the info to the authorities.

(My wife is my responsible person, I have a regular format for my day's plan that I leave with her when I go out on an adventure.)

I would suggest that an email would be a better option (even to your wife). Paper gets misplaced and you don't always have it with you. Presumably one always carries their cellphone.

Of course, you could take the belt and suspenders approach and also print out the email. That way even with a power outage, and a dead phone battery, the info would still be available.