According to Joseph K. Houts, Jr., in his book, QUANTRILL'S THIEVES, Yeager was killed at the Flannery house. His grave could be near there, or possibly with his wife's family the Muirs? Have you been in touch with Duncan Hansen? He has a couple books out on the gravesites of Quantrill's men. I have his snail mail address if you need it.
Rose Mary Lankford