Welcome to you from SE Ohio.
The entire site is chock full of info on different subjects. You can use the search tool to aid you in your research. There is a member from PA (chaunc) who fishes Mosquito and Pymatuning a lot and posts pretty regularly. I would suggest posing your question to the Pennsylvania state forum page as well. It would be helpful to add your intended method of fishing (boat, bank) and where you might be wanting or are going to be fishing. Good luck chasing those Crappie this year!