Darn good concept. I think I would go a bit lighter on some items - one change of underwear would be sufficient, ditch the PJ bottoms, a couple of other things that are basically personal preference. I would add a pair of leather work gloves, and a very light FAK. They are likely to come in handy in the situation you are describing.

I have a similar stash in an ActionPacker kept outside the house where I can reach it easily