The entire place is also free to visit which is a huge plus.
This really is a must see, I also didn't even get a chance to visit the visitor center which I'm sure also had good information. I also would recommend walking around the fort to get a good look at the full defensive line, including the dry moat and palisades. Being into archeology I appreciate that they have these open to the public.
The entire fort is a replica except for some brick ruins of an old fireplace, which is well marked. National Parks service clearly did a lot of research to accurately recreate the fort. There is also a good model showing what the original fort was like and the process of rebuilding it. The staff and information around the fort does a good job of showing you what the different buildings and rooms were used for.
It really transports you back in time to a revolutionary war fort. I love historic forts and this is the most accurate 18th century one I've seen.