I guess, if you want to do all that.
As for your trick with the ice, let me go slightly one better. Freeze a cup of water in advance of a storm. Put a penny on the frozen surface of the water before you leave. If the penny falls all the way to the bottom, you have a freezer full of death. If it didn't go all the way to the bottom, the food is still good.
pretty smart.
For brief power outages etc I have the chargeable flash lights that you just leave plugged in - when the power goes out they kick on. Water storage I keep a couple dozen gallons frozen anyway so never had to really struggle- but it helps when the rain starts falling to fill your tub/sink/washing machine with water. If you need it to flush toilets, wash, etc it'll be there. If you don't need it, it still gets used.