It's more than what you require, it's how much. The simple answer is that you must first learn to live off land if your goal is to survive.
You'll be surprised at how many options there are to prepare for an emergency. This list does not necessarily mean that you should go out and purchase everything. You must at least be able to identify where to begin when planning for disaster.
It is important to be prepared for everything. You have to be prepared for any situation if you're serious about survival.