For anyone out there who's interested, I'll fill in basic genealogy information (dates of birth etc).
Youngs Elliott Benton b 18 July 1837, Long Island, New York, son of Youngs Elliott Benton b 1807; married Alice H. Chapin born about 1858 in Michigan, daughter of Reuben Chapin. Lived in Genesee County, Michigan.
Genessee County, Michigan
Youngs E Benton 42 born about 1838 in New York, father b CT mother b NY
Alice H. Benton 22 wife born about 1858 Michigan
--living with them or on their place is one farm laborer
Youngs Elliott Benton
Mary Olive Benton 1882-1883 in Linden, Genesee, Michigan
Herbert Lester Benton
Charles Elliott Benton 1887
Reuben Howard Benton 1891 [ = Howard?]
One of the possible burial sites would be the place where Alice was living in 1900, something more specific than just Iowa. Also important to mention is the source of your statement that this couple was in "this part of Nebraska" in 1891 (Howard's WWI draft registration?) and again to be as specific as possible about the place.
Hope this quest has worked out for you and if not we'll try to help.