I sing unaccompanied, whether in an Irish session, for a funeral (see other post for funeral music ideas!), or gospel & spirituals, or perhaps some Native American (Choctaw/Cherokee), not to mention mid-evil songs. One need not be in a rut when playing "old time" music as there are thousands of tunes & songs in the public domain. The more tunes & songs I learn, the more I find that I don't know. One might consider branching out into the realm outside of doo dah, doo dah, and set the barn on fire with some fancy fiddlin, even if there is no specific style of fiddlin attributed to Kansas. My fiddlin friends in OZ seem to set in with "taters" and end with the smoke risin from the strings & bow. Learn to read some music & get some books by Burl ives & others who spent many years researching tunes & songs of the early times of our country. In other words, get yourself out there and go to some festivals, get some new fangled CD's with tunes you never heard of and play along on them thar new tunes till you learn 'em!