I think we do have the right Sarah F. Stottlemyer Trail because I found an "S.F. Trail", wife of Nathan Trail living in Allegany Co., Maryland in the 1870 census. (The post office is Flintstone).Living nearby are her brothers John, Joseph, Cromwell or Conrad, and their families, and also Ransom, who is single.
Do you know Nathan Trail Jr.'s mother's maiden name?The census shows Amanda is her first name.
Would you like any of the Civil War soldier information on Fannie's brothers?And do you know the married names of Fannie's sisters Mary E. and Lucy E.?
Regarding Fannie's stated age on her marriage license- I've often found that many women cannot seem to remember their correct age from decade to decade. One of my relatives shaved off a year to two on every census!