I would need a large stock of TP if an earthquake hit. AND clean underwear.
My dad and the other guys in my family go commando.
Actually TP is the last thing that should be on your list. It is soft and flimsy because it is intended to be flushed.
In a situation with no running water, you are going to throw it away instead of flushing it. Take it from an old woodsman and hunter, paper towels are a much better bet. They work and their superior strength means that you will avoid the dreaded finger poke through.
If there is no running water, the finger poke through is very unsanitary.