Looking for family that primarily was Living in BUCHANAN CO., IOWA in the 1800's -2000's.

Names such as (Meeker, Postel, Woods & Gilson). My son's fathers' side like: Charles L. Meeker, Marge (Woods) Meeker, John R. Postel, & Mary (Gilson) Postel. Any information on these people & their families would be very much appreciated. I know that John R. & Mary (Gilson) Postel are buried somewhere in Winthrop, Iowa area. Any information about them, Family, Photos, News Articles, etc. would be helpful in adding to my son's family tree. He would also like to reconnect with his fathers families as well. The above named persons are my sons Great-Grandparents.