Gitch U:
Sorry I did not put any time into my first reply. I was running out.
Anyway, it is hard to give suggestions. We don't really know your bug out demands. If you are going to portray an over whelming show of force as you escort your family. Then you want to outfit like robo warrior.
The old US 1956 web gear feels more comfortable then say the VN - 1980's stuff. It can still be found at bargain prices. The new Load bearing vests are very comfortable. I just personally don't like them. I spent a lot of time crawling in my youth. All I want between me and God's green earth is a shirt. With one exception. The old style leather US shoulder holster is a must have. You can adjust it to fit over your pectorals. Your .45 goes on first, and is last off if you are on the run and have to start dumping your ruck.
I have also found that used old beat up G.I. gear will out last 90% of commercial packs and kit. Alice and the new high tech stuff is great. But designed with the idea that the wearer will have some sort of body armor on. So comfort has to be figured against the low cost. Top end stuff is just that "Top End". The price is set because it has high demand, best materials, and is proven to work.
If your bug out plans include keeping a lower profile. You may for example be in constant contact with sheeple. One of those Aussie outback coats can hide any weapon. Sling the M1A butt end up real high. Plus a good "real" outback. Is oilskin and rain proof. Heavy, but well worth looking at. Work your snaps so they are loose and don't use the zipper. A real oilskin is a once in a lifetime investment. Not to mention you can wear it anytime.
IMHO your short .45 is a good choice. (If, they got the geometry correct, the way they did with the Government model). Shoot the snot out of it. It should get better and better the more you use it.
For rations I gave up on MRE's. I had one spoil inside my pack. That was ugly. I now use Jewish Matzo crackers. Found in the ethnic section of big grocery stores. They come with tight sealed packaging. High carbo calories, poor taste but what the heck. They only cost a few bucks and will last forever. Even in a hot car trunk.
Hope this helps you out. SB