Depends.  If the community has treated me well and I can afford it, I'll be at the station personally authorizing each pump, it's price and the amount to be pumped.  My employees will get 'hazard/disaster' pay as well.

Some may get unlimited gas for free.  Some may get no gas at any price.  Some get rations to get out of the area at a high price.  

Disasters and local communities are personal.  I'll give a highly personal response.