If and when... some group such as the volunteer fire department, will undoubtedly at least attempt to take charge. They will coordinate rescue, set up emergency shelters and distribute such supplies as are available. As a part of this procedure, I believe it is safe to assume that they would also feel free to "requisitions" whatever was thought necessary to this end. That would include whatever is left on store shelves, in gas stations, restaurants, school lunchrooms, local farms, etc. When the emergency is dire, such requisitioning eventually extends to individuals with scores being settled and neighbor denouncing neighbor.
As a matter of survival, I would suggest freely and voluntarily giving up that which you will eventually loose anyway.
It is this with which I take issue. You posit a volunteer fire department organizing to loot the supplies (not "hoardings," not "gougings") of those who were sensible enough to prepare, and you seem okay with that, recommending that we preppers simply give them our preps.
In a few words: Over my dead body, and yes, I understand it may go that way. But the volunteer fire department will be as much smaller as I can make it before I go. Nobody has a right to steal from me, under any circumstances whatsoever, including the end of the world.
Yes, I speak from an urban perspective. Quite a few folks live in urban areas, and not a few of them are preppers. We have our own special problems, but your problem will be facing those urban hordes when they come boiling out of the cities looking to appropriate your preps. If your local volunteer fire department has left you any. With any luck, if we manage to keep our heads down and bug in, they'll overlook us in their eagerness to find richer pickings - in a word, you.
As for reaching you, well, some folks think that being 300 miles or so from a major urban area will protect them. I suspect that if it ever comes to pass, they will discover that they are wrong.
By the way, for what I think is a fairly realistic view of what will come out of the cities looking for food, read either the second book of Nova's American Apocalypse series, American Apocalypse II - Refuge
, or Bill Forstchen's One Second After