Welcome aboard. You'll find a great bunch of people here. Where exactly are you. From Chester county myself, near the Delaware line.
Actually, the sky's the limit for orchids here. The climate on the whole is pretty nice for growing just about anything you want as long as you have room to bring them all in come fall.
I know, you're talking about native orchids. A good start is Spiranthes odorata 'Chadd's Ford' a native discovered in Bear, Delaware. Available anywhere and very, very easy to grow. Lots of Cypripediums are available on-line if you're willing to shell out the money.
Bletillas are inexpensive and easy to grow although not native. Mine have not been invasive.
John Tullock published a book on growing hardy orchids that provides good advice and lists sources in the back. You should be able to find his book in the library.
Growing Hardy Orchids:Amazon:Books
Cheers.
Jim