Good ideas in general, but from the experience of losing a parent and an in-law in less than 10 months and in the context of planning for an emergency situation, I disagree with “Particularly valuable items should be kept in a safety deposit box.” :(
Depending on the situation, it could be difficult, if not impossible to retrieve the items.
That’s a very good idea. I had thought of saying they should be kept with another family member, but that has its’ drawbacks, too.