Sounds like a good plan if you do not get rained out.
I would suggest you take a camera and make photos if possible.
Then in years to come, looking at the pictures will be easier than trying to check paper and pencils notes.
Do you hsve any idea when your Cagles came to
Arkansas?
I was a
Temple and they were related back in some part of western
Tennessee.
The
Temple family came around about the early 1840's and were around close to the river. I would almost believe the
Cagle family arrived during the same time.
Good luck.