In my area the obvious disaster is earthquakes. Numerous sources give the standard procedures for "safing" your dwelling for that occurrence and some procedures are enshrined in building codes - securing your water heater, etc.

What is interesting is that the most common disaster all of us face is fire - originating either within or outside the home. Bugging in is a bankrupt strategy for that occurrence, except in occasional situations. Therefore plan B had better involve leaving the old homestead, together with priority items.

I say that because twice since I have been in my present house, the car has been fully loaded, ready to drive away, because of advancing wildfires - and I am an advocate of bugging in for most disasters.

You must be flexible and provide options for yourself.