I’m not sure about Laurel, I’ve kayaked it, and up around the ’canal’ where the water is shallower (few feet to 5 feet or so) the water is pretty clear, although it has that brownish tea color (Tannic) from the decaying vegetation. So I would assume that in the deeper portions it’s going to filter the light pretty bad.
I have been told, haven’t gone myself, that Fuller lake (also in Pine Grove Furnace State Park) is pretty good. It’s an old quarry I believe and they let you dive there, as well as there is a swimming area there (keep the families occupied ;-). I’ve been wanting to do that one for a few years.