Easy.
The area you describe is just east of the "Northern Plains" area. That means that the point types will be a mix of Northern Plains types and Eastern types. Probably 200 different points if you look at the time period from Paleo to Late Prehistoric. Historic types will include some more types made of iron, brass, and copper from trade with Europeans. Then there are the various inuit types that might be found on the Northern fringes of the area you want. This also does not include the various bone, shell, antler, and wood points. Then there are also specimens made of naturally occurring Great Lakes copper that were made before contact with Europeans.
Then you'll have to decide for yourself which stone blades are knives, which ones are atlatl points, which ones are ceremonial, and which ones are arrow points. Archeologists have no clue. God might know.
In other words, you've got to narrow it down just a little bit.