Well, I have:
1. Family bug out bag
2. Urban survival kit
3. Hiking survival kit
4. canoing/kayaking survival vest
5. Diaper bag

There is some overlap of gear in them, but each is kept seperate and stocked, ready to go. It's a little more expensive, but much easier. I think it's also safer as I'm not going to forget to return one thing to bag if I borrowed it for a different situation.

-Blast