"What I always thought weird is why not have everyone armed with Ruger 10/22s..."
DING! DING! DING!
Winner winner chicken dinner.
.22s are far quieter than other firearms, and can be further quieted a lot easier, as well.
You can easily put a 50 round magazine, like a Hot Lips, on a 10-22. The .22 is MORE than powerful enough to zip into a zombie's skull. The lack of recoil makes double taps quick and easy, if needed, or dealing with a herd a lot easier, as well.
You can also carry tons more .22 ammo.
What annoys me about Walking Dead is the constant insistence that "it's got to be the brain!" to put a walker down, but often the crap they do (like the broken pool cue up through the lower jaw and coming out the eye socket) don't come close to getting to the zombie's brain, and many, many other tactics don't come close to the brain stem, which is what Jenner said was the only part of the brain that the virus or whatever restarted.
And has anyone else noticed that zombie skulls tend to be made out of marshmallow fluff and crepe paper?
And finally, one of the things I'd be using for zombie control at the fence?
A generator, an air compressor, and a nail gun.
How much you want to bet that you could go to any big box store in any town and get an air compressor and a nail gun and a gazillion nails with no trouble at all....