I will second that, Louisiana, Like most of the South & West allows firearms (loaded,accessible) in your car. Also non concealed carry is permitted ( except in airports,schools) everywhere.
MASS has some of the most restricted laws in the country.
Please note having a firearm is TYPICAL in Louisiana, most people do and may not be aware that the northeast have a different take.

I wonder if security is present in most shelters ?
It would seem like some form of legal obligation to provide physical security exist.

Personally I can't imagine resorting to a public shelter.
Most of the buildings used are just marginally better than a basement or office building if that.