Here's the update: anyone in the area is welcome to attend a memorial service. Mary's daughter Sabrina was thoughtful enough to post it on Facebook:
John R. Johnson, 74, of Carbondale, and his co-pilot Carl S. Maiden, 47, of DuQuoin, passed away at approximately 6:30 pm Wednesday, August 29, 2012, near Canton, Missouri, while enroute to the annual antique airplane fly-in in Blakesburg, Iowa. Many of you have already expressed condolences. But we invite you to a memorial of their lives. A reception will follow.
Huffman-Harker Funeral Home 210 W Oak St, Carbondale, Illinois 62901-1456
3 PM this Saturday 9/8.