2menelo,
Where in Mississippi are you?
You might want to try and find a scene shop that may have or rent backdrops. When I have needed a large or varied backdrops I have rented them. If you are shooting people, you may need a very large size. One can never have enough backdrop.
Have you thought of a seamless paper backdrop. The larger photo retailers often carry them. I have used white seamless up to 10' wide.
You could try and call the Mississippi Film Commission. They may have a listing of vendors:
MISSISSIPPI FILM OFFICE -- Jackson MS
601-359-3422 --
wemling@mississippi.org
MT
K