The vast majority of people who think they can survive an apocalypse with a backpack of tactical axes and MRE's are delusional cosplayers. Even the people already out in the wilderness with gardens and animals and stockpiles of guns are woefully naive to how hard it would actually be to survive if the walmart they go to every week closes down.

All that said, there is absolutely good that could come from investing in some cheap land further north. Not to become some kind of wild survivalist but to do exactly what you said, be a part of smaller communities that can band together and share resources. The hardships coming are not going to be like The Walking Dead, this shit is going to take years or even decades to ramp up, but that's still lightning fast on a climate scale, meaning there will be storms on top of storms, inundated cities and coastlands, refugees swamping places that can't handle it, and a lot of really hard times with a failing economy and shortages of everything from food to power to fresh water. We will slowly see a pretty major social shift in the first-world as people are displaced and the wealth divide becomes extreme, there will be shanty-towns on American and EU soil that rival the poorest countries. But yes, it will take a long time and there's going to be an absolute mess of politics and economics and social upheaval through the entire time.

And there's no fixing it. This is the hardest part to sink into people. That it's not a "rough patch" that this temperature increase is effectively permanent. No human is going to see the Earth cool back down unless someone does a major, rapid, and successful, geoengineering project. All things that are still more fantasy than remotely reality at this point.