If mammoth cave is not in the cards for you then go to
Grand Rivers at the north end of Land Between the Lakes National Recreation Area.
Stay in the Canal Campground which is run by the Corps of Engineers.
Eat one of the world famous 2 inch pork chops at Pattis
Here's a google map of the area. You can see that Grand Rivers is right off the interstate
and the Canal campground is the Northern most one. Just over the canal!
Most sites were shaded the last time we were there. The sites are reasonably spread
out and have water and electric hook ups.
They had SEVERE ice storm in January and shade may not be so good but
you'll only be there one nite.
Be sure to call or check on reservations. They are scheduled to be open by June.
There are other campgrounds a little further down the "trace road" that
runs between the lakes but this is your closest one.
You will enjoy a little stroll thru Grand Rivers and also around the grounds of
Been there, done that, will go back!!
Hope this helps!!