Of the BLS Kits at Galls, the one that seems best suited for personal disaster preparedness considering contents, container and adaptability for handling a couple-three additional items is
THIS.
I've piecemealed together my own kits from mostly military surplus OD nylon ALICE gear that's NOS (new old stock - unissued surplus) and surplus medical supplies. It requires devoting time to research what's available on the market. That may not be for you. The results; however, are superior to prefab kits. If this interests you, I can share links for describing and procuring what I use so you can evaluate those items for possible use yourself. Keep in mind that you can choose a carrying bag from any source and order a prefab contents
Refill Kit from someplace like Galls if you don't want to hunt down all the supplies yourself. It's worth considering.