Re: What are you doing to prepare?
Most sites that I have been too don't recommend storing in plastic milk jugs but they are the cheapest route to go. Just empty the water out of them every 3 months or so.
You can get by on a gallon per person per day. Depending of course on the climate and your activity level. Just for yourself, that would be 90 gallon containers for 3 months. Five gallon containers can be purchased from the store or find a supply of those water cooler jugs.
After water sits for a while, it can build-up bacteria. Here are some ways of treating it.
Water Disinfection Tips
If the water source is questionably contaminated, it should be disinfected prior to use. All stored water should be disinfected prior to drinking. The American Red Cross recommends the following methods for purifying drinking water:
Boil for 5-10 minutes, or...
Add 10 drops of a household bleach solution per gallon of water, mix well and let stand for 30 minutes. If the water is cloudy, double the amount of chlorine. A slight smell or taste of chlorine indicates water is adequately disinfected. Or...
Add household tincture of iodine in the same manner as bleach above, or...
Use commercial purification tablets such as Halazone or Globaline. Follow package instructions
You can get emergency supplies from your own house.
The hot water heater, the tank on the back of your toilet(if you haven't treated it will chemicals) swimming pools.
If you have gutters on your house, you can disconnect them at the ground and run rainwater into some big barrells to collect the rainwater. You will have to filter it with some cheesecloth to remove particles of the roofing but it will be drinkable with some purification.
Here is a site that isn't try to sell you anything: