I don't have a"mission profile", I have a life.
In my life, I have a wife, children, pets, a house and a career. All these are in a real setting, called Earth, where bad things can and do happen, so I take precautions.
You talk about a post-Katrina scenario, I really doubt you have any idea of what happened and what the aftermath was like. You seem to live in a Jerry Ahern or Richard Matheson novel, rather than the real world. If you got your information about Katrina and its aftermath from the mainstream media, including FoxNews, you are clueless. I suggest you read this and find out a little about real life:
http://www.popularmechanics.com/science ... 15076.html
Pay special attention to page #7, if you get that far.
I live in the Houston area. In September of 2008, we were hit by Hurricane Ike; my house was in the eye wall of the hurricane for 5+ hours. The neighborhood was without water for 2 days, power for 3 days and cable/Internet for over 2 weeks. I ran my generator for 3 days straight, and did not run out of fuel for it. We have a pool and we filled the various bathtubs in the house ahead of time. My family and I were comfortable and the children were not even bored but this was not by accident.
Do you have a generator? Do you know how to start it? Do you know its rating and what it can run? Do you have days of fuel for it? Do you know how to flush a toilet without running water? Did you know you can't easily siphon modern cars? Do you have drinking water for several days, and for every one in the house? Do you have a chainsaw with fuel? Do you have axes and so on? Do you have batteries for your flashlights? Medical kits, flashlights, portable radios, TVs, DVDs? If you answered no to several of the above, you are what many of us around here would call a victim and a liability.
I have many other such questions, but you will notice a few I did not ask.
If you need to worry about flooding, wildfire and mudslides, or if you need to worry about firearms as a top priority in your neighborhood, you need to make moving your family out of there your top life priority.
If you think that all you have to do is arm yourself with your Mini-14 and simply wait for the government to come clean up your neighborhood and bring you food, you're toast but simply do not know it yet. You are a first responder as we all are in such situations, but after several hurricanes, blizzards, tornadoes and earthquakes, I can assure you that weapons are way down on my list of priorities of items to have on hand.
But they are not at the bottom of the list. On the other hand, I did not go shopping for a firearm with a "mission profile" in my mind. I can assure you that just a handgun and a .22LR rifle are plenty for your scenario. A high-capacity 9mm with a few spare mags and a Ruger 10/22 with a brick or two of .22LR ammo are all you need. I have a CHL to go with the handguns, do you?
I have everything that I need to keep my family safe and comfortable for several days or longer. Do you?