Rachel,
I know it has been a while since you posted this. I hope you still have the same e-mail. I have just started researching our family's tree for my grandchildren. My daughter-in-law is a land. Her name is Carrie Nocloe Land. When I saw the Rainwater connection to your grandmother, I was hoping there is a connection.
Carrie's father was Harvey Lynn Land, Her grandmother was Glayds Rainwater, and her mothers name was Lillie Burge.
If you are still searching and have any information, please contact me.
Thanks,
Connie McDonald