Sounds like your trap should work. The cold does slow fish down and that is to your advantage. I live in Pa also and have had a lot of luck with a trout net catching small sunnies. This net is fine meshed and I attached it to a pole. These fish seem to like to hang out next to the bank in the vegetation. If you pull towards the bank with net you should be able to catch a bunch. I caught hundreds in the early spring when it was this temperature.