Obviously, if you’re packing a Go Bag, you are limited to the number of supplies you can take with you. You’ll have to narrow it down to the bare necessities.
The Go Bag bridges the gap between the Pocket Survival Kit and a Bugout Bag and packs a reasonable about survival gear in package small enough to bring along.
The post SHTF effects can last from 72 hours to a few months. It is impossible to establish how much a crisis can last since there are always unknown factors.