If you are looking for low carb foods that will keep for a long period of time, vienna sausages and pork rinds both come to mind. We used to keep an earthquake kit when we lived in Japan, but that was before my daughter was diagnosed with T1. It has only been a year, so I can't give you any more tips that those!
We have a grab bag that contains lots of the things you have. I would recommend to include "Gu" (http://en.wikipedia.org/wiki/GU_(food)). Its slightly different as i understand its more slow release (lower GI) than the regular energy drinks. It comes in a handy pack and each one contains 27 grams (aprox). They last for a good period of time. Make sure you get the decaff option. To help with keeping the insulin cool we have started using frio bags ( http://friouk.com/buy/ ).not fully tested yet (in emergency) but i'm sure if you follow instructions they should work as they say
does food really matter as much as insulin? we often have the discussion, god forbid that something bad happens. Weather, war, terrorism whatever, sorry to be dramatic but you only have so much insulin. if the world ends and were left with nothing. Where would you get any insulin? Been meaning to ask the endo this question. Will they write extra scripts without your insurance company knowing? I dont know. Think about it
We carry a RX for everything when we travel and will probably put a copy in our emergency bag.
Although this would not help you immediately, it would allow you to get what you need easier once you reach a safe place and your supplies dwindle. When Katrina hit New Orleans and people were evacuated to Houston and Dallas, it helped to have a RX with you or to have your RX in a national chain database where it was still accessible and could be transferred. Otherwise, you had to stand in long lines to see a clinic doctor to take your medical history, examine you and get a new RX or medical supply samples. As you can imagine, the process was chaotic at best with many people in great need of their medicines and medical treatment.
But with an RX, a volunteer could get you to a regular pharmacy and help you arrange payment.
Someone mentioned vienna sausage I would think most any canned meat would work such as spam, canned chicken, tuna etc. Also beef jerky or slim jims.
Another item that is good is baby food and snacks which are low in carbs like yogurt melts 32 of them is only 6 grams of carbs and the star puffs are only 5 grams of carbs for 1/2 cup. Like another person wrote below - the frio bag is a good option. I live in Miami, Florida and I use it when we go to Disney and it helps. Hope this helps.