Thanks to everone who has contributed some words of wisdom so far. I have to say that I agree with many things that have been submitted. There have been a lot of thought-provoking answers, and more questions asked, which is the purpose of any good conversation. I am firmly in agreement that no single firearm is the perfect choice, but depends on what one is fleeing from or towards. Yet I need to plan and pack something that will cover most of my needs quite well, far in advance. Again, I believe that this is more for a temporary situation than a full-fledged national emergency. I have realized that my narrow weather escape while 9 hours from home meant that I needed to have a lot of items packed and in my vehicle every day, not sitting at home. I considered the effectiveness of my sidearm, which I always have near me, but I believe I need a packable rifle that can discourage the wrong people and also select game if needed. I'd lean toward a rifle caliber over simply using a pistol round in a longer barrel. I'm thinking a .223 AR-type carbine might be a decent choice. They are plentiful, fairly simple to fire and repair, ammo is nearly universal by now, etc. I like the light-ish weight and ease of finding mid-to-larger capacity mags.
Some other items which are a factor are these:
1. Cost of new equipment which MAY be stolen, since it will stay in my vehicle fulltime. I can spend $3K on a full-blown battle rifle with all the latest features, and then have someone bust the window out and take the whole pack. Not a fun thought.
2. How familiar another companion may be with that weapon, if needed. I may not be the one handling that weapon.
3. If that weapon has me perceived as a 'threat' to be eliminated when visible, or simply a person to be left alone. That's a stretch, but it's possible.
I think the main goal is to let bad guys decide that I'm best left alone, if I have no place to isolate immediately. I do agree with the idea above that
prepping might make me a nicer target when SHTF.
4. Ease of accessing that weapon with short notice. A take-down rifle would need time to unpack and assemble, which might be an issue.
5. Weight and ease of carrying, since I would prefer to carry it close by, if I'm forced to be on foot.
I think of the military when they need to place their guys in those same scenarios. Correct me if I'm wrong, but they normally give them a sidearm and a carbine, and a decently prepared pack. I never got to serve, so I'm assuming several things here. I'm hoping the guys in uniform with some
experience can chime in and add some wisdom here. I'm wide open to more good ideas.