I have not fished the Zoar Valley but have been told by multiple independent sources that it's a place that every Steelhead Angler should fish one day. I've heard it is absolutely beautiful.
Here's a few pieces that you might find helpful:
Zoar Valley Multiple Use Area - NYS Dept. of Environmental Conservation
I think Gatortransplant aka AJ has some experience on the Catt.
Would love to see some photos if you end up going!