The easiest way of finding if you are related to Harland Sanders, is to have a male of your line who carries the surname of Sanders, have his DNA tested. Then post the results to this web site http://www.myfamily.com/group/sandersdna
I believe there is at least one member related to him. Even if you are not, you might find some other Sanders you are related to. Lots of Sanders lived in Kentucky, Tennessee, and southern Indiana who are NOT related to each other.