I am not able to think of any field trips that do not involve travel to New York so instead I am going to list several places in New York that would make for great field trips AND teach about New York state or people from NY.
New York City
New York Historical Society (view their collection here)
Hudson River Museum
Erie Canal Museum
Power Project Visitor's Center (teaches about hydropower)
Susan B Anthony House
George Eastman House (the founder of Kodak)
Hill Cumorah Visitor's Center (run by the Church of Jesus Christ of latter-day saints)
I am sure there are plenty of other places as well. Please share if you have any that you found to be educational.