Check with the experts in the Fruit and Orchards Forum. Bet you can find someone that knows there.

Here is a link that might be useful: Fruit & Orchards Forum

My sons father-in-law is grafting Oconee on native
stock south of Houston. He is having good results.

I have a tree that may be a Choctaw, it was here when I came. Thin shell and high oil. Good shade. a little
smaller nut but fine flavor for an improved varity.

Mooreland is reccomended for our area but dont know
anyone that has one.

Scab is a big problem here for non resistant types.

Check womacknursery.com they specialize in pecans
east and west, tells about Oconee, Desirable, Choctaw
no Moreland.