There's "modern society collapse" and there's "a 5 day blackout in a city", most people are not even prepared for #2, it doesn't hurt to plan for that.
Most farms depends on big tractors - if society collapse they will have a lot of food rotting in the field unless humans get out there and deal with it by hand. You won't like your lifestyle, but if you can get to a remote farm (remote is key - you need to get away from labor competition) you can do okay.
walls? moat? traps? guns and a lot of ammo? because you answer "no" to any of that, your well-stocked rural setting going to be visited by the hoards fleeing from city and depleted in a week, leaving you to die of starvation in next 3. So that month I was talking about, still going to happen