Man, I'm real sorry to hear about your job.
After two years of working balls to the wall, our factory laid off half the people. I survived this cut, but maybe not the next.
I'll be honest here, none of my usual BSing: I've done what you're doing before. First when I was a kid, son of a construction worker, layoffs happened a lot. I grew up without electricity and TV until I was 11 or 12. Didn't know I was missing anything. I know my parents were real worried about how I felt about it, and they about died laughing when I shouted out "It's cool! We get to life like Davy Crockett and the frontiersmen!"
The second time was in the mid 90s. That time I lost everything and did the hobo thing. I clawed my way back to the "top of the world" and between my family screwing me out of most of what was valuable to me a couple years ago and the looming employment disaster, I stand to lose everything again.
If it happens again, I'm not going to bother coming back. I'll go back to the "frontier" life and anyone who doesn't like it can bite me. I'm single, no kids, so I'm not dragging anyone down with me.
That being said, you've got an adventure ahead. Your biggest discomfort at first will be the lack of water-on-demand, but you'll get used to that soon enough. You're going to find out that you have to do a lot more work in day-to-day life, but you're going to feel like you're wasting less time. I look at my rat race days and ask "WTF did I even accomplish?" I didn't have that question when I lived hard.
Now, for some advice: with the impending legislation to allow the government to encourage, and then demand that 401(k) funds be partially or totally invested in treasuries, take the 10% hit and take your money out NOW. They've already made it so you can't withdraw your money, even with the penalty, unless you leave your job. Invest it yourself. There's plenty of investments, that while not making huge gains pay 9-11% dividends. Better than any of my 401(k) investments lately.
If you can, scrape up the cash to buy a netbook and a solar charger. Many places like McDonalds, Barnes & Noble, Books a Million, many restaurants, etc have Wi-Fi, and a netbook can hop right on that. You can get a decent one for $300 or so. You don't need subscriptions like for a cell phone.
Buy a couple of Write in the Rain Fieldbooks and their waterproof pens. Keep these with you to write down the stuff you learn about skills and plants and whatnot. You'll have a permanent record. Buy as many journals, or spiral notebooks or just reams of paper, a bunch of pens or pencils and such. Two things that kept me sane (ish) was reading and writing. Write everything, it's like having a conversation with yourself. A lot of hobos make "'Zines" -- essentially several sheets of stories, notes, doodles, etc, that they sell to people for a dollar or two. They get a little money and keep themselves sane, and people get adventure stories about doing things they can only dream of. So, although you may not try to sell them, they will be good memories later, and give you something to do for entertainment.
I don't know how far from a town you will be, but you may consider something that worked for me. I'd go to churches. Now, they are used to beggers. What I'd do is ask if they knew of any jobs available, and if not, I'd leave them some info on me and stop by now and again to see if any of their members would pay me to do some odd jobs and such. I'd also ask for food, but tell them I'm not looking for charity, and ask if I could rake the church lawn, trim the hedges, vacuum the floor, or something. This always got me a much more favorable response. This does a few things for you: makes getting some supplies easier, gives you contact with other people (you do need this), networks you with others, and helps find jobs and such. If nothing else, you can attend services, and enjoy heat/AC every now and then. Some churches also have showers they'll let you use, and some have "fellowship meals" where everyone comes, sits around and eats and talks. It's way better than dinner at the Salvation Army or other shelters.
Speaking of shelters, they'll usually have a time of day that people can come in and take a shower for free, and often have a day or two they'll let you do your laundry for free. You can check into that.
Sign up for unemployment and food stamps. They take money out of your pay for unemployment and taxes for food stamps. Get 'em if you can. If you can, hold on to them. You might not need them, but they may save your bacon down the road.
Feel free to email me or whatnot if I can help you out.