I'm not sure if there's any knappable rock in your area, but you should get in touch with Ithaca Primitive Pursuits, they're an organization out of Ithaca College that does primitive skills camps and workshops, my friend worked there this summer. She said they had some stone, but it was imported. You should definitely contact them and ask about local rock or if they know where to find Onondaga chert up north on the Onondaga escarpment. I currently live in Syracuse right now, attending SUNY ESF. I'd suggest starting with glass, to get your skills up.