Gents; Thanks for the response. I think about "survival" in generalities. Not planning for anything specific, just hoping that the skills and equipment I put together will cover the bases in what ever happens. My understanding of a BOB is to supliment our edc and allow us to escape whatever situitation we find ourselves in: Think light and fast. What I'm asking about is the step beyond the BOB. This is the bag you grab, when you have access to it, when you think you'll be gone for a while.I think of it in terms of a travle bag. Home is no longer tennable and I need to leave with my family. We will drive as far as we can and then walk. To my mind, as has been demonstrated yet again recently, shelters are not an option. So off we go to the hidey hole. If we can make it that far. The pack is to allow transport of the stuff we need to make this trip. How long will the situitation last? I plan for the long term, if it turns out to be shorter, nothing lost. Just wanted your thoughts Re. the packs you use for such applications. Thanks Jim