This resembles earlier scenarios previously discussed here in different threads, but I'll bite.
First of all, unless you live in the desert, no one needs a 6 month food allotment neatly packed away in the basement/garage. Water, yes; Ammo, yes; Food, no. A simple formula to remember is: Training+practice= Food. Learn to trap, hunt, fish, field dress, cook/smoke, conceal, and store harvests properly. Develop a small indoor or outdoor greenhouse for fresh veggies. My reasoning behind not storing so much food is because food that keeps for that long isn't good for you in the long run (especially MRE's). What will you do when stored goods run out? Danger will still be everywhere.
Second, I say let the poor bastard in. Teach him, and his family, what you know about survival/marksmanship/field craft. They will soon become a great asset, and even improve your friendship (barring any infidelity issues).
Lastly, in this sort of scenario, you'll have to risk your life damn near every day to survive, so that point is kind off moot when it comes to supplies. A lot of people don't know the first thing about survival. They're hungry and without their cable TV, so emotion will get the better of them. Therefore, their mental acuity and ability to survive has decreased. That will make it easier to spot and dispatch any would be aggressors in your AO. Take a gander at this thread:
http://professionalsoldiers.com/foru...ad.php?t=41217
These are my opinions only, YMMV
