Aaron and Rachel are not buried at Oakwood.
Their graves are "located west of Switzer. From Hwy 221 turn onto Waddel Road (s-42-120) and go 2.5 miles, turn right onto Drummond Road (4-1943) and 1.2 miles. The cemetery will be located on your left in a pasture."
Aaron Arnold 1760-1857 and wife Rachel Adams Died 1839.