Hello, I am sorry I don't live in Wisconsin but I know the Beaver Dam Community Library, 311 N. Spring Street, Beaver Dam, WI 53916 houses indexed cemeteries for Dodge County. I do not know if Oakhill Cemetery is one of them or not but it would be worth it to write. PLus this library has old newspapers on microfilm; if you know the death dates there might be an obituary written for your ancestors that the librarians could look up for you. Beaver Dam Community Library phone : 920-887-4631, fax: 920-887-4633. Good Luck! Jane