In a SHTF scenario, the people that will try and flee to the boonies are not the inner city crowd (too scared to go out to the woods) nor the basic blue collar worker (they and their families have lived in the cities for generations) - it will be the white collar yuppie types that have a mini-van and 2.5 kids, that flee with the clothes on their back and the only gun they have ever seen is that old .38 that was inherited from grandpa that's now rusty because it sat in the attic for the past 20 years along with that 1/2 a box of ammo manufactured in 1965.
These will be the people you will find flooding your area and camping on your property - and most wouldn't know a hammer from a saw, much less have done any manual labor.
These will be the people that try and build a fire in the open in high wind because they don't know better and burn your crops and house and scatter your livestock, these are the people that will piss and shit in your once clean spring or creek because "well, a toilet has water in it" ......

You get the idea !