Although I have no connection to the Sheldon or Woodmansee families, I can provide a few more details about the families history in Lorain County. The Woodmansee family you are researching, lived in Lagrange township -- as you already know.
The family of B.B Woodmansee is enumerated in Lagrange Township in the 1880 census. They can be found at:
B.B. Woodmansee 1880 Ohio Census Lorain County Lagrange Township Series T9, Roll 1042 Pages 530A and 530B
In the enumeration, are B.B., his wife Salvina, his son D.J. Woodmansee, and David's wife Ida. B.B. Woodmansee is listed as a Miller --- and an 1879 history of Lorain County lists him as the owner of a combination sawmill/grainmill on the east branch of Black River in Lagrange Township. An 1874 Lorain County Atlas shows the mill. It was located on the east side of Indian Hollow Road, just south of state route 303. This is a little east of the village of Lagrange. Located adjacent to the mill in the 1874 Atlas is a cemetery. A look at a current Lorain County map shows that the cemetery is still there. It is known as the River Road or Knowles Cemetery.
David Woodmansee is later enumerated in the 1900 census for Lagrange Township.
David Woodmansee 1900 Lorain County Lagrange Township Series T623, Roll 1295 Page 171
In the 1900 enumeration, David is listed along with his wife Ida, his mother Sylvia (age 82), and two young boys. The boys are listed as boarders, Earnest and Wilber Knapp, ages 13 and 10 respectively. Presumably, they are related to David's wife Ida (nee Knapp) --- brothers of hers, perhaps.
You didn't mention in your posting, if you had found the burial location of Bradley and Silvina Woodmansee. I wonder if they were buried in the cemetery next to the mill? They are not listed in the cemetery records on the Lorain County GenWeb site, but the names posted are names that were transcribed from the headstones. Perhaps no headstone currently exists, or perhaps it is illegible. If you think it possible they are buried there, you might want to contact the cemetery office regarding all burials in the cemetery. Since Silvinia was living in the area at age 82, with her son, it is likely she is buried in the Township.
Just a few thoughts --- hope some of the info is useful.