Klint TB is located in the middle of LBL just off the Trace. I'd say it is probably about a 2 1/2 to 3hr drive from Murfreesboro, depending how you drive.
I went to TB in March. Pretty cool place. I didn't see anything too challenging, except for the one they call Buttpucker Hill (very deserving of the name), but I rode with a beginner to moderate group. I think there are more challenging areas there.
I've been there 4 or 5 times. good place to wheel. Its only as hard as you want it to be.There are a few hills I've never seen anyone climb, or even try. Check out the site itsajeep.org. lots of people there from the Kentucky and Tennessee area. Let me know when you plan to go or join in on an IAJ ride anyones welcome and its family friendly.