Don't forget your toilets. They take more water than anything. Long term storage of toilet tank water is easy. No boiling or purification needed. We have a small spring fed stream about 1/8 mile away and would use this source in an emergency. Do you have a stream or other viable water source nearby? A 7 day scenario in summer is mostly about water and using your perishables first. More daylight in summer. Less need for oil lamps and candles. Rise at dawn and bed at sunset. Heating not an issue. Put the kids to work around the house if they whine about being bored.