To add to Bill Cody's comment, yes, Hybrid Stiped Bass are available/allowed in PA. I believe your temp. range would allow them, however, they have specific needs/preferences which are detailed extensively on the forum.
Everybody's comments are right on about establishing your forage base. Except for a few extreme cases, you probably can't do any wrong by getting fathead minnows established, as well as some regular bluegill (an example of a mistake could be stocking a lot of bluegill early on if walleye are going to be your main predator - anyone, please correct me if needed).
I would not be able to help myself but to dig some holes in the ice and dump several dozen fatheads and shiners into the pond now, as well as catching some bluegill & yellow perch from a local lake and putting them in now. If that would be a mistake, I'd like someone to correct me. But I still wouldn't be able to help myself.
Like Theo and others said, you have a lot of predator options.
I have been satisfied with a fish supplier out of Harrisburg, PA. If you want his contact info, I can send it to you. One advantage I get from this guy is that I can get fingerlings or larger fish from him. A few months back, I put in 12 HSB, and their total weight was over 20 lbs.
Do a lot of research and ask a lot of questions on the forum here. You could have a crazy-ass SMB fishery with reproduction like Eric is experiencing right now. In such a case, you may not want to ever introduce LMB. These are those tidbits of info. that can make all the difference.
