I don't think Boo was on WKSF, he did spend some time in Knoxville though. Boo was my live overnight guy in Athens, GA (on a soft AC, btw) a number of years ago. He was a scream to work with.
I do remember getting WDJX on AM from time to time. They were very polished and noticeably different from anything we had local. WOKI had a different sound in almost every year of its existence as a CHR, but always had a hard time trying to get a major market sound together. Another station that would blow in, when the conditions were just right was 93.3 out of Forest City, NC/Greenville, SC. In the early 90's 93.3 WBBO was a very tight flamethrowin' CHR. Again, a conditioned I-100 listener would hear a station like WBBO and react to it like it was a signal coming in from outer space.