What do you keep in the rear storage?

[ABMW]

This might be a bit off topic, but I'm curious. What do you all keep in the rear under the "floor" storage area where the space saver rear tire is (for those of you who don't have third row seats).

As well, For those that do have 3rd-row, and have limited space, what do you keep in the small trunk.

In light of Haiti, the massive winter storms in CA and AZ, and the quakes we've been experiencing here in Northern CA as of late, I've filled the storage area with safety gear:

1) First Aid supplies
2) Tube Tent Shelters and tarps
3) Coat Guard Rations for 3-days for 2-people
4) Multiple high-end LED Flashlights & dozens of batteries (properly stored)
5) Tools, both automotive, etc.
6) Cleaning Supplies
7) Fire starters
8) sleeping bag
9) Knifes
10) Basically everything that it would take to keep 2 people alive for 1-week.
11) On my wish list is an AED (automatic electronic defibrillator). I was an EMT, upon a time, so it's my thing/hobby, in case I come upon an accident or cardiac arrest. They're about $800.00.
12) Tire repair kits
13) Emergency Water

This has as much to do with the fact that I often take seldom used roads and park to go hiking, far from the reach of cell phones (but hopefully) within the reach of SOS road side assistance, though I'm dubious as to what would happen if the battery goes dead and the SOS can't make a call. I wish the SOS system had its own external battery or could connect to make sat. calls.

My fear, obviously, is that in a worst case scenario, upon the return of a hike in the middle of nowhere, the BMW would choose that exact time to not start- perhaps due to a dead battery. So, I've stuffed it with as much as is humanly possible, in the event I don't have my "Grab & Go" bag with me, which is what many here in the Bay Area have near their front door, etc.

At least, those of us in our early 30s, who are into that sort of thing: the survival of disasters, that is. I live less than 1-mile from one of North America's most active fault lines, so for me it makes sense. But, do any of you take similar precautions, for example some of you living in the East where extreme winter conditions can take place. For example your vehicle could slide off a road, and not be visible whatsoever, etc.

As a side note, I've wrapped it all in plastic wrap (the stuff you buy to close boxes when you're moving or to wrap furniture in), to keep it water proof, or in the oft event the vehicle is submerged.

Call me paranoid, but after witnessing Haiti and Katrina, and being the back country crawler that I am, and having suffered an accident in the middle of nowhere, prior to the advent of cell phones (I was not driving), coupled with a vehicle in which "some" have experienced less than stellar reliability records with, I'm taking the safe route.

Anyone else? I know the car will start 99.9% of the time, at least I expect it to, but those are the steps I've taken thus far.