We experience fairly frequent "bug out" events here is SoCal, especially during wildfire season. The ARC and other organizations will establish shelters which are then way underutilized because the buggers go about as far as a handy motel, park, or friend/relative. In the case of some of our larger wildfires, those displaced have run into the thousands - they are simply absorbed by the infrastructure.

We have relatives about 120 miles distant. that would be our preferred destination if we have to leave, and we have good friends even closer who might take us in. The situation is reciprocal if they have to bug.