Bugging in/out depends upon circumstances. I have twice had my vehicle loaded, ready to leave with a healthy wildfire about a quarter mile away. with wildfires, it is best to leave.

My local area is prone to earthquakes, and if we are ever hit by one that causes significant damage to the residence, my first choice will be to bug in. Basically we will camp out in the yard, utilizing what we can from the wreckage, and carry on.