BEFORE YOU PACK IT
Before you start assembling your gear, you need to decide how you will carry, what type of weight you can tolerate and exactly what you need.
You may not need frostbite gear in Florida or sun lotion in Alaska. On the other hand, no matter where you are, you need a thermal tent, which should be a portable fold-out type. After you survive an injury, blood pressure and temperature regulation suffer. You need to be under this tent until help arrives.