Bluegill are certainly good for ponds in PA, but as you mention, Crappie are generally not recommended for smaller bodies of water.

You shouldn't have any issues sourcing bluegill or yellow perch here in PA. Smallmouth and Walleye are more challenging. Certainly, money can fix some of those shortfalls. At a pond I'm working on, we are having fingerling Smallies shipped in from Hartley's in KS.

Zetts in Drifting, PA. usually has SMB but says they didn't pull off a spawn this year. Fenders Fish Farm over in OH won't starting dealing with SMB until Oct/Nov., and can't guarantee anything.

Channel Catfish will also be easy to source as well as trout, but trout will most likely be a seasonal fish that doesn't make it through the summers.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."