They are most common in the slower sections near the river, youll need a canoe for your best chance. Harrods creek is in North East Jeff Co and western Oldham County. I fish there often in my boat, if I see one I will try and throw a cast net on it for you.
There is a place to park off covered bridge road (1694 in Prospect) and Locke Ln, walk down under the bridge and you can wade around there. With enough searching and a bit of luck you should be able to find one. Common snappers are, well, common down there too as well as TONS of snakes. Just make sure you dont get in to what I call fiery hell, stinging nettle, its a ***** of a plant and you will immediately regret brushing up against it with bare legs!
Last week a caught a baby slider and the coolest baby long nose gar about 7"!