When I started buying firearms I gave thought to bugout scenarios. I bought the following firearms to keep continuity in ammunition. I also wanted reliability.
I have two Smith and Wesson M&P .40 calibers( I bought the second from a guy who came into my buddy's gun store hurting for some cash)
I have a Smith and Wesson M&P40c compact version of my other. Its not really compact as it could be.
I have a Smith and Wesson Night Guard which will shoot both .40 caliber, and 10mm. Though I only carry .40 cal
I also have a have a Charter Arms .40 caliber 5 shot ankle revolver.
On the issue of knives, I really dont want to get this close to a walker. If I have to though, Im going to be carrying my Becker BK9, and my K Bar Olive drab marine issue. Both have thick blades, that hold their edge well, and can be sharpened shaving sharp.
I know some might think my gins are a little overkill, but Id rather carry overkill, than not enough kill.
I have some changes to my pistol carry, simple because of some options Ive found to be very reliable and more versatile. I went out and bought a Sig P250 acouple of weeks ago because a friend of mine recommended trying it out. I did my research and after seeing the how easily you can from one caliber to another and change the gun out I decided I had to put it through a torture test. I can't get my videos to upload propperly with my new camera, but this is what I did.
1. I dropped it in the mud with the slide locked back. I let is stand for about 2 minutes then retrieved the pistol. Quick dunk in a bucket of water and it fired flawlessly.
2. Submerged in water it fired without fail, while this is not a very hard thing for a firearm to do it is a standard test for the military.
3. Finally I rapid fired through about 20 15round 9mm clips. Heating it up really hot, and without fail it still fired.
I still plan on carry more than one pistol, maybe more than 2. With the option to change out the calibers on that gun between 9mm, .40, and 45acp I have a lot more options for ammo.