Playing " Devil's Advocate" for a second...
IF Ray had to ask someone else how to disappear, then chances are, nothing they could tell him would cover the subject matter fully enough for a voluntary disappearance to be successful.
A person who hasn't been a "fringe" type person needs skills and resources to successfully leave a documented life behind. I don't know if any can do it in 2014.
Of course, if people presently are successful, then we never know it, success meaning they have disappeared to an unknown destination, right?
IMO, there's much more likelihood that Mr. Gricar's remains will be found at some point in time.
Or, we may never know in our lifetimes. People in Europe often accidentally find bones that were hidden centuries ago.
I am learning that sometimes, there simply are no answers available to us in this lifetime for things that are so difficult to accept. It is hard to accept that there might never be a proper funeral and burial of a good and productive man who did so much for justice in Centre County. It's hard to accept that he may have been killed, for many reasons.