... Gwinn Island Marina is located on the main lake. Go about 0.3mi up the lake and there's a creek mouth (other end of the island) .... go in there and bare off to your right when the creek splits, and you'll be looking at the road that runs from behind the Marina onto the island. Along the riprap of that "road" section, there's usually alot of brush & floating debris that gets pushed back in there. I've fished in there, before, and caught some from around the brush & logs ... and even from some of the standing trees that you pass by, as you make the right hand turn around the backside of the island. Don't pass up any kind of wood cover along the bank, especially if it looks to have been there for awhile.
FYI ... just to clarify -- when I say "up the lake" ... I mean towards the headwaters, not towards the dam. Thumbs Up

Though I have fished the lake since I was a kid ... I mostly fished around the Red Gate Creek & McKetchney Branch area, back then. Also fished alot, in later years, around the Kennedy Bridge area ... mostly in the small pockets & creeks that run off the main lake between Kamp Kennedy Marina & Hideaway Cove. When the lake level is right, and brush/logs get hung up in these pockets, the Crappie will hang around those.

Herrington Lake is basically a 30+ mile long "river", dammed up on the North end, that flows in a SSE to NNW direction. Map > Herrington Lake, KY

As Tube Man has said ... it's not an easy lake to fish for Crappie, but they're there & in good numbers & size. I have caught some in the 2lb size range, from there, years ago ... so I see no reason why there shouldn't still be some Slabs still roaming around. But, remember ... there is no size limit, and the creel limit is 30/person/day.

You might also want to scroll down to the bottom of your screen, while reading this thread, and check out the "Similar Threads" links ... you might get some more insight into this lake.

... luck2ya

... cp