Burying them just isnt really practical anymore, though, unless they're right next to your house. See, ATF knows that guns get buried, and will likely go put up a bounty for anyone that finds them. Also, they dont use regular metal detectors anymore, they use I think ground penetrating radar. You cant do the old "throw a bunch of screws and nails on the ground" trick anymore. Forests also get reclaimed by development, too, so getting back there often isnt possible.
I think this would do better in strategies and tactics.
A way to hide long guns would be to hide them in the house, like inside walls, or the false pipe that leads to nowhere. Or, hot water heater is another good one. Big speakers are great, too, I know a kid that grows weed in his big speakers.
If the ATF or other agency is in your house searching for firearms, they'll likely do a little tearing, but they're probably not that ambitious. If they ever get really ambitious, and want to take apart stuff, you should use, ahem, appropriate means to get them out. However, I dont think they're really ambitious enough to start taking apart stuff or go tearing through walls.
Living in the desert has it's advantages for hiding stuff, as nobody wants to or can spend prolonged times in the desert. Also, the desert enviroment is perfect for firearms, as proven in Iraq. It's dry, in Iraq, all the insurgents had to do was clean the sand out of the Iran-Iraq war surplus and they were good to go.
If you got a compost heap, you can always hide guns there, and put raw meat in the compost heap. Unpleasant=unsearched. Basically, you should give the searcher so much trouble and mess that he just gets frustrated and goes home.
Another strategy is just have a few guns to give up, maybe even a "cache" like 5 nagants and 1000 rounds of ammo, that can be found really easily. This is often a tactics used with the pyro hobbyists, they keep a shoebox of firecrackers handy just so the cop finds "explosives" really quick and easy, and calls it a day.
You guys should check out those books, though.