With an infant 'd say you'd be better off bugging in. So the necessities are obvious - shelter, water & food.
Sounds like you are good on the shelter and with a well you could convert to hand pump when the time comes as long as you have the pump &
instructions...and if your well isn't too deep for a hand pump.
Stock up on more food because I'd say a years worth for each person would be ideal. Also with your land you should start a garden or better yet get
the best use of your land with a permaculture type set up with chickens and a small pond. If I had 3 acres I would!
First aid supplies and a good medical emergency book.
Durable clothes and shoes (especially different sizes for the growing little one...and cloth diapers!) for all weather. Good socks are vital!
A wood burning stove or fire place for indoor cooking & heat would be nice provided you have available firewood....axe & wood spliter too.
Weapons (for hunting and protection), tools, hand crank lanterns/flashlights/radio, maps and a back-up plan/location that you can get to if you have
to bug out.
If you cover these bases you should be able to ride out any survivable catastrophe. If anything bad does happen your goal should be to get through the
"big die off" when many will starve to death.
There are these "all I'll need is a gun so I'll just take what I need" people - I know of at least one personally - so you and your group better be
prepared to kill or scare them off so practice shooting. But I'm betting by the time they realize they need to eat they'll be weak and not much
trouble because IMO they're already not too bright.
Good luck and don't go too crazy!
edit on 1/24/2012 by RedParrotHead because: (no reason given)