I caught fish both above and below Rt. 9. I was the eighth car in the dirt lot above the bridge–people are definitely out on the water. No evident bug hatches, and the water was a cool 38 °F.
Photos are below. The first one is of a trout about 17″ and is a grizzled veteran. Another trout, in a photo second from the bottom, was fat and full of simulium larvae.
Note that the dirt lot at the hatchery pipe area was a sheet of ice, and there were some icy patches all over the trails. So, if you go there, mind your steps. It can be treacherous. Also, I didn’t see many fish in the hatchery pipe area