Hey Gregg Welcome!
I grew up in North Carolina/Virginia and the vast majority of my family are still in the Carolinas...nice to hear from "Home Folk"!
My husband and I have been preppers for years, its more of a way of life for us. Regarding Food Storage...we built our 1+ year food storage via the one-extra method, meaning each time I shopped, for example: If I needed a bottle of mustard then I purchased two bottles, one to use and one for storage. At the end of a year, it gave us a years worth of food stockpiled...food that we are accustomed to eating! I don't know about you but when tshtf, I will be stressed enough, my gut won't need a new diet to contend with!! The drawback with this is it will take a full year to accumulate your food storage. Personally, if you are "Bugging-In" I don't care for dehydrated, pre-packaged foods and would opt instead to purchase shelf-stable, healthy, food stuffs that my family is accustomed to eating. The key to this is look at what you eat, and determine how you make it from scratch...thats what you store: shortening, olive oil, flour, sugar, salt, pepper, spices, yeast (keeps in the freezer forever), cornstarch, pasta, nuts, peanut butter, then you go out from there. I can all our meat, then I don't have to care what the grid does. Soups and Veggies you can buy at Save-A-Lots cheap and after this year, you can your own home grown! Don't forget things like Jello--cheap, shelf stable and gives your family a boost when they need something sweet.
That being said, don't forget seeds! Even in the mountains of NC, you have a really strong growing season, so be certain to add 2-3 years worth of Heirloom Seeds to your preps. Also, assuming you are Bugging-In, spend some of that money and put in a root cellar. This will give you safe year-round storage for your food preps without having to try to heat/cool your storage shed. Now, don't freak out and think that a root cellar will cost you thousands of dollars!! Our closest neighbor (2 miles away) just put in a root cellar and he did one for another prepper friend and start to finish, both projects cost less than $800 each! Get this, he bought a dead school bus, drug it to his place, dug a hole big enough to bury it. He then pushed it into the hole, went down, jacked it up, took off the wheels and leveled it on railroad ties. He then built access to the back door as the entry and then backfilled the hole! Before he covered it up, he did put a vent pipe in the roof and then using poles and salvaged tin, he built a sloped roof over top of the bus roof to take the weight of the soil and then covered that roof, leaving the vent pipe exposed. They are fabulous root cellar storage! He built shelves around the walls, down the center he has bins with sand for carrots, potatos, etc. He even built a rack to hang his onions! His latest "luxary" is he went to Harbor Freight and purchased their solar lights for a shed and he now has solar lights in the bus/cellar!
Yes, food storage is vitally important but so is the means to safely store it. You must also look at shelter, heat, water--when there is no power grid to support those things. Something else to consider is a Pressure Canner and a Hot Water Bath Canner, as well as Jars and Lids...you are going to need these items to assure food preservation for your family's future.
Blessings,
Shenandoah