Wow! What a spread of material. And a good way for you to panel the picnic photo! I will add some thoughts about it.
Panel 1 Standing lady at end is Aunt Betty. Uncle Day behind her, surely.
Sitting boy is Telford on the left. Who is boy? I doubt if Bradley, Rayford, and that bunch were born yet.
Panel 3 Evelyn Metzger beside Mary.
Tall couple still look like Koons
May to right of boy with bat Uncle Albert?
Lady beside Kenny Aunt Zella?
Panel 4 (lost track) Phyllis is sure. Melvin was two years younger, so not the baby in Margaret's arms.
Man behind Aunt Ivy looks like a Strayer. Oh, that says Strayers are around. Of course, Grandma's family.
Panel 5 Lady beyond Aunt Ivy looks like Uncle Lester's wife. Was she living at this time?
Note: Man behind Kenny Link is Milt Lohr.
That's how I am seeing it now. Barbara