Militiaman
Are you going alone or do you have a family? If alone a man can live with just about anything. Where are you going to. That is what you need to know to pack a bag.
If you are reporting for duty then your unit already has a list. If just going to hide out then you need to know where, what is available in the area, and what is already cached in the area.
The most important to know is how you will get there. How much can YOU carry for how far.