Last week I learned that an elderly couple I assisted some years ago had both died. Their seven grieving children descended upon the house and were unable to find the wills. I received a panicked call. We needed the original to file with the court, and I encouraged them to look again, this time armed with a description of how I package final papers. To their relief, both wills were found.
Grieving a loved one is hard enough, don't make it any harder by keeping your will so safe that no one can find it. I always encourage clients to tell their personal representative the location of a will, but not the specific contents of the document -- that is private.
As always, I recommend you consult with an estate planning and probate attorney in your home state for legal advice....a blog post is not legal advice.