My buddy and I are planning our spring trip for May. It looks like this will be the "Gone With(out) a Trace" trip: I am routing us on the piece of the Natchez Trace we've not ridden (the curvy and hilly piece north of US64 to Nashville), The Trace that runs through Land Between The Lakes, and the Buffalo Trace distillery in Frankfort KY.
So...what'd worth riding between Nashville and Frankfort? I've already done the wild cave tour at Mammoth, and I don't see my buddy willing to do it, so I won't suggest that.
BTW, last fall's trip was "Many Waters" tour when I routed us across the MS and Ohio and several lakes and rivers, and it rained on us all day one day.