That looks pretty terrific to me - more than I carry near the city.

One thing I do always have on me and use quite often - for dog walks and hiking - is a small Moleskine notepad and pen (Space pin refill cartridge, actually).

I can imagine that being useful for recording medical info (vital signs, etc) and if for some reason you needed to write something down for the kids.

And the pages would be useful fire tender in a crunch.