This may be a fun one... How would your hunting practices or strategy change if your harvests were the only source of meat for your family?
That's easy.
For the first 3-4 years we were married, that's all the wife and I ate meat-wise. Then we kinda moved up in the world and started enjoying ribeyes and chicken wings. Then this summer I had a crisis of conscience and decided I didn't need/want commercial animal produce. So I've got a fair amount of experience sustenance hunting and will be doing more of it going forward.
If you go by the USDA's recommendations for daily meat servings, about 6 deer a year will provide the 2 of us with that amount. That's not a hard bar to clear. I've cleared it annually for probably the past 6-7 seasons, and almost doubled it half of those years. Alabama has a decent deer population and a liberal bag limit. I hunt a lot, and am not picky about the deer I shoot. No real need for poaching or special tactics.
That many deer deboned and all fill the chest freezer and the fridge freezer pretty nicely, so canning it to save room is nice. If you're eating it regularly you want a lot of it cubed for stews and stir fry, and a lot of it ground for burgers, spaghetti sauce, tacos, casseroles, etc.
I can run limb lines for catfish pretty efficiently, and the bay holds crabs and mussels. Ducks and squirrels and other game are really more for fun than efficiency. But I would say most hunters on this forum, if they really wanted to, could go "vegan" with the exception of locally-obtained wild game. It's weird to me that so many hunters (myself included) don't do that.
The SHTF/Apocalypse stuff is so far outside the realm of possible/rational it's not worth discussing. Batman vs Darth Vader kinda mental excercise. You can look all over the world across millennia to see what happens when a post-agriculture society reverts back to hunter/gatherer ways out of desperation. Mass starvation and total depletion of species. Shoot, a measly little depression in the 1930s almost wiped out our deer herd and it didn't last a decade. Practically nobody starved to death, plenty of the land was arable, it was much more rural...we still almost wiped out several game animals practically overnight just because we were slightly hungry.
I'm a well above average killer and I'd fully expect to starve if the supply chain broke down. I'd be desperately trying to build a community and reestablish trade with other nearby populations vs trying to lone survivor it on the compound. That's how people survive. Self reliance is a myth. Even ye olde rugged mountain man relied on commodities and artifacts that were the end result of a global supply chain held together by the largest and most technologically advanced navy known to man at the time.