I'll second that on water, a water cistern or making one from the gutters can be a great asset and I would also use tarps, trash bags or what have you to make water collection points for rain. Another thing I would get is a good quality sleeping bag rated for very cold weather, the two biggest killers that will get you the quickest is cold (shelter) and water. Shelter will kill you faster than not having water but both are critical. Living in Fla for us buys us time for shelter and water is a lot plentiful here but a lot of pesticides and virus, but these past years we haven't got much rain where we are at than along time ago. We're good for shelter here from rain and cold down to 40 below zero if needed with good down winter sleeping bags from Western Mountaineering. The only need for a fire would be for cooking and to keep warm when not in the sleeping bags, we would limit fire activity to the minimum to conserve fire wood. As for food after depleting all the reserves and eating all the oranges and figs off the trees, then it's fishing, hunting squirls, cat's, dogs etc.. with a BB gun. The BB gun is quite and low profile, will not attract attention as much as the other weapons and keeping a low profile is a must or it's off to the big house. The big guns are for big game if needed and thief's and zombies . Unfortunately we don't have very big game where I'm at. I guess if you look at it and you are caught by a LEO, you'll get free meals and shelter anyway so it's a win win I guess. The bottom line is you live.