PA has a very small strech of border with Lake Erie, but really stocks a disproportionate number of steelies, regardless. They only have a few small tribs, and they are mobbed, from what I have heard.
Don't know about Ohio, I have heard that they do have some stocking.
NY does some stocking, particularly in the Cattaraugus, in the western end of the sate. From fisheries people, they have one of the best natural reproduction of any of the finger lakes - lots of small feeders, in the headwaters, too. Maybe I'll take a trip down this spring. I understand you have to buy a "reservation permit", as most of the land is Indian reservation.