This is a really comprehensive article on food prepping! I was very taken by your last item on “Edible Landscaping.” There is a natural antibacterial, antiviral product called “Sambucol,” that is a syrup (patented) made from black elderberries. There is another syrup similar called “Sambucus,” which is the botanical name for black elderberries. Not only do they taste delicious — like something to top your ice cream sundae with! — they are pretty amazing for coughs, colds, and flu. I am thinking that that might be a good thing to have growing in our yards when SHTF.
This is a very interesting premise, but the episodes get tiresome as the format is increasingly repetitive. Also, some really obvious mistakes that the preppers make are sometimes ignored: shelves full of glass bottles at eye level (no lip on shelves) in preparation for a major earthquake? Also, the one issue preparation (climate change, economic collapse, Yellowstone blowing up, etc.) seems tunnel-visioned, but apparently the shows' writers need that statement as a justification for their script. The fact is that most of the preppers and the needed preparations that each makes are very much the same in the outcomes they're working toward.

I would add just a few things though, if you use creamer in your coffee add a few bottles of the powdered version, some dried fruits or a couple large bags of trail mix, pie fillings in a few fruit varieties (awesome in oats!), crackers are great for kids who won’t eat a tuna, spam or other canned meat sandwich but they may be willing to eat “lunchables” DIY of course!, and other all in one items like spaghetti O’s, canned stew, canned ravioli, and ramen. It may not be the healthiest solutions but if you need these items you will be exceptionally grateful you have them!
On the Survival mission "Taveuni" in the Kuva Fortress, the Lotus notifies players that the Grineer are harvesting Kuva which can be optionally intercepted. When a life support capsule is deployed, an Eximus unit will spawn, killing this unit will drop a Kuva Catalyst, which resembles a red-colored power cell from Excavation missions. Bringing this Catalyst near any life support capsule will turn it into a Kuva Harvester, and a 1 minute timer will countdown. This tower can be targeted, which has 4,000 health, and must be defended while also keeping life support above 1% until the timer is over, after which all players will receive 200 Kuva.

I hope this makes sense to you. It sounds like you have already figured out that with a growing teen and two additional children in the household, this will be a good start but that more will be needed over time. By doubling these quantities my guess is that you will be better prepared, food wise, than 90% of the population. And even without doubling the quantities, you will be better prepared.
Above all, the nice thing about it is that camping gear doesn't need to just sit in your closet, collecting dust on the off chance that something bad may happen a decade from now. You can simply grab it and head out for the weekend every now and then; camping is fun, doubly so for kids. It's also a great opportunity to test some of your other equipment, and spot potential flaws in your preparedness plans.
Dry survival rations. Sold under several brands, including Datrex, ER Bar, S.O.S., Grizzly, and more. Biscuit-like, less sugary and with a more agreeable taste than energy bars - somewhat reminiscent of shortbread. In my book, S.O.S. and Datrex taste best. Very inexpensive (~550 kcal per dollar) and should last 5-10 years when stored in a cool place. A tolerable choice for short- to medium-term nutrition in an emergency. Easy to pack, giving you ~2,200 kcal per pound.
Do some research to make sure you are not wasting your time on implausible risks. How likely is it that you would have to face this particular danger, and how much damage can it conceivably cause? For example, do you live in a 100-year flood zone? In the path of tropical storms? In a high-crime neighborhood? Be sure to search around and study publicly available resources; reaching out to local emergency response organizations can be a good plan, too. Try to focus on reputable sources; the science in doomsday movies and on conspiracy websites seldom checks out.
Survival kits, in a variety of sizes, contain supplies and tools to provide a survivor with basic shelter against the elements, help him or her to keep warm, meet basic health and first aid needs, provide food and water, signal to rescuers, and assist in finding the way back to help. Supplies in a survival kit normally contain a knife (often a Swiss army knife or a multi-tool), matches, tinder, first aid kit, bandana, fish hooks, sewing kit, and a flashlight.