Take this for what it's worth based on one man's 5 minute encounter at Shot Show last year. They were rude, elitist, dismissive, uninformed and unprepared. Other than that, I'd go there in a heartbeat. (All I asked was a couple of questions on the courses and the prerequisites.) YMMV
Try Gunsite or Thunder Ranch. If East Coast is a requirement, email me and I'll put you in touch with someone.
Rich