I moved to Rural Retreat, VA about 3 years. I've asked around, but no one seems to remember the crash. However, I was able to locate the actual FAA report that gives all the details:
http://www.airdisaster.com/reports/ntsb/AAR70-22.pdf
I see this crash was due to an electircal problem and that your father's crash caused flight manuals to be changed to include some very vital information about the generator switch which was not available at the time of your father's accident.
I hope this brings you closure knowing that your father's death was not in vain, but may have saved many other lives. Hugs and best wishes for the future.