Try landbetweenthelakes.us
Across the top of the page, look at 'See and Do' and select 'Camping'
There you can find Piney and go to that page.
There is info and a few pictures.
You can also see a map of the campground at landbetweenthelakes.us/visit/maps
We stayed at the other campground Hillman Ferry a number of years ago. it was very nice and setting was beautiful in the fall.
If you have time, drive up to nearby Grand Rivers, KY and visit the area Patti's 1880 Settlement (pattis1880s.com)...neat area with a good restaurant.