This doesn't help with their burial place but it might be something you don't have.

Missouri Marriage Records, 1805-2002
Name: Alice Dunaway
Marriage Date: 1 Sep 1892
Marriage Location: Stockton, Cedar, Missouri
Marriage County: Cedar
Spouse Name: W H Nipps

This may be the W H Nipps who married Alice Dunaway.

1900 United States Federal Census
City of Stockton, Lynn Twp., Cedar Co, MO
Hotel run by Harriet Webb
William H. Nipps boarder w m Mar 1868 32 widow IA OH NY dentist

Here's Alice living with her parents.

1900 United States Federal Census
Washington Twp., Cedar Co, MO
William? Dunaway head w m Oct 1845 56 md 32y MO IL IL farmer
Luca? J. Dunaway wife w f Aug 1848 51 14ch 9?liv MO MO KY housework
Juney? E. Dunaway dau w f Jan 1879 21 MO MO KY teacher
Whig? F. Dunaway son w m Jul 1882 17 MO MO KY farmer
Bennie? Dunaway dau w f Jun 1885 14 MO MO KY housework
John N? Dunaway son w m Oct 1886 13 MO MO KY farmer
Elma? C. Dunaway son w m Apr 1889 11 MO MO KY farmer
Alice D. Nipps dau w f Nov 1869 30 div 2ch 2liv MO MO KY school teacher
Cecil R. Nipps grson w m Jun 1893 6 MO MO KY at school
Merril V. Nipps grson w m Jul 1895 5 MO MO KY