If your homestead has a creek you could do like homesteaders of olden times did and build a spring house to use the running water to keep the spring house cool and use it to help keep foods cold. They would build the spring house near the creek and then divert water from the creek through it.

Then they would submerge perishable food stuffs in the water to keep them cold. If we ever have a long-term power outage, anyone living on a homestead near a creek could make use of this knowledge. Bright Hub has directions to build your own spring house.For a temporary power outage to keep foods cold you could also try a Non Electrical Refrigerator Zeer Pot.

Click here to see how:

http://www.brighthub.com/environment/green-living/articles/116158.aspx#