Is anyone researching this family???

Peter Bristol b. @1834 New York married Rebecca Fuller b. @1837 New York in Newark, Allegan County, Michigan on 31 March 1855. In the 1860 census (same location) they had a daughters Elizabeth and Helen. Eventually, they settled in Ludington, Mason Co. and Lake Ann, Benzie Co. Michigan. They had a son Peter Jr., and daughters Carrie and Maude.

Carrie Bristol appears to have married a man named ?? Magill (Mcgill) before 1894. She is found alone in the Michigan State 1894 census in Lake Ann. On 12 June 1897 in Lake Ann, Benzie Co., MI., Carrie married Frederick Graham. In the 1900 census Carrie and Fred are living in Lake Ann and have one daughter Margret W. After this point I lose Carrie and Fred and don't know what happened to them.

Peter Bristol appears to have died before 1910 when I found Rebecca living with her son Peter Jr. and a grandson Edward (age 2) in Lake Ann. In 1920, Rebecca is living with her widowed daughter, Maude and her three children. Rebecca is in her 80s at this point. I have not been able to locate Peter Jr. in the 1920 or 1930 census or locate Maude Bristol Bush in the 1930 census. No other information on the older daughters of Peter and Rebecca Bristol.

My main interest is in Carrie Bristol Magill Graham and family. Thanks for taking a look and for any help you all might be able to offer.