What are the best places to stay anywhere in NYC or NY state for a larger party of 12+ people (needing 6 bedrooms)?
There are a ton of great hotels in New York, so you have a lot to choose from. I don't know what your budget is, but the Langham Place, New York, Fifth Avenue on Fifth Avenue is very nice. It is located in New York City. Hotel Elysee New York is my favorite hotel I have ever stayed at. It is a quaint little place, with only about ten rooms per floor, but theres plenty of floors and it is very nice and reasonably priced. I suggest you check it out!
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Are you looking to rent an apartment or stay at a hotel?
Try AirBnb so that you can rent out an entire apartment. Most hotels are very small.