What do you consider 'recent'? I last visited the NY Disney Store in mid-December of last year (do you consider that recent?). I wouldn't bother unpacking any traders unless your visit happens to coincide with a pin trading event as (when I was there, anyway) the CMs did NOT wear lanyards (or even have them behind the counters). I have no idea what the pin selection will be like when you go and I can't even take a guess. I was told that pins are limited and can vary, depending upon shipment. When I was there, the store didn't have a single pin in stock (but the store might have just received a shipment when you go, you never know).
Maybe someone who lives closer to or in NYC and visits the store more frequently can give you more current information about the store's pin status. Alternately, perhaps you could phone the Disney Store and just ask the CM these questions and see what he/she says.
In any case, have a safe trip, a wonderful time in NYC, and fun in camp. 🙂