Look you will not need to be in your shelter for weeks. You already have the basics down. I would only prepare for around 3 days. Food, water, a change of clothes, blankets, toilet, reading material, maybe some family games, some cash. Remember it may take a few hours or a day for someone to find you, but don't clutter your shelter with unnesseary junk. The red cross and others are usually on hand to help with other things you may need in case of a total loss.

Also instead of a bottle jack I would recommend, A Hi-Lift jack like the Jeep guys use. It is more expensive, but it lifts much higher than a bottle jack. Remember you don't just need the door open it needs go high enough to get whatever is on the door off of it, or to get an elderly person out. Also an extension for the Jack, and a good demolition style pry bar.