It's safe to assume that in any real cook off everyone is dead. Some immediately, some a little later. Those that do survive will likely starve because the land will be unusable. You wont be able to go by car, bicycle, or anything else - it'll kick up resting fallout. The panic will last weeks or months as people desperately try to escape. Supposing you survive the initial attacks you will be stuck where ever you are. Then you have to deal with your neighbors - I hope you didn't tell them you have guns/food/ammo/medicine in passing. After 3 days people begin to die of dehydration, after a week those that could stay hydrated will begin to do literally anything to eat. Your friends suddenly will turn on you, so will your family, and everyone around you. Best stash some rations for them. You'll need a team to survive. Following the guide lines of FEMA will have you underprepared by such a larger margin it's laughable. 3 days of food and water will get you to the point you can wait in a line for humanitarian aid (which won't come in a fallout zone). You'll need months of rations for each person.
The only winning move is not to play.