I've been thinking of a major BOB that would serve the needs of all three of us, the baby, the little woman and myself, for up to 7 days, in the event we can only take one bag. While she's very strong and capable, in a really bad situation her main job is the baby. To this end I am thinking of one of the huge backpacks like they use in the arctic. I also have a duffel so large that we jokingly refer to as the bodybag. I had thought I could make another BOB in it and leave it in the back of her SUV with the other survival gear. Though as has been pointed out on here duffels are not the greatest idea for BOBs. I am entirely open to any advice on this project.