Glad I could help, hoss. I totally relate to rural living and all the wonders that come with it. Found out a couple months back that I have three crack dens within ten miles of my fortress of solitude!
Another option for spare mags is something like the Diamondback Tactical shoulderbag panel. Basically, it's a square of codura covered in PALS webbing. You attach the pouches you want (GP, Smoke, Rifle Mags, Pistol Mags, whatever), and carry it over your shoulder like a purse. Shorten the strap and you could hang it around your neck if it wasn't too heavy after loading.
Of course, something like this is separate from the rifle and adds seconds to the response time. How many seconds would depend on your level of training, but I do like the idea. The frontiersmen of yesteryear carried a "Possibles Bag" everywhere they went, and in that bag was everything they needed to run their rifles and live off the land (ball, powder, shot, patching, needle/thread, mould, flints, spare parts, knife, etc). Not a bad idea with todays minutemen......