Is your wife a shooter? If not she needs to have a comfort level with driving, AND basics of hand, shot or long gun. I'd lean towards a 20ga pump.
I understand you are prepping for 7 days. However, You are way under stocked on food, not enough meds, or water. Your next problem is AURORA. The metro area will be over run with the FSA dead beats, gang bangers and other newly converted predators.
Come day 7 you will be hemmed in by the opposing team, making your evac that less possible. IF you have other like minded folks in your area, i suggest a get together and game plan that gives you strength in numbers.
Regarding your current vehicle. IF it gets that bad weather wise, you will not be the only one unable to move.
Too much money.
THIS IS WHAT WE HAVE AND WHAT YOU / EVERYONE NEEDS. You store 12 rolls of TP inside the bucket and 5 bags. the rest goes in what ever else toiletries you take. Wally world carries them.
http://www.amazon.com/Reliance-Produ.../dp/B000FIAPXO
http://www.amazon.com/Reliance-Produ...ef=pd_sim_sg_1