There were also plentiful Leni Lenape (Delaware) indians in the Philadelphia-Delaware settlements. Philadelphia's map is full of Indian names, such as Conshohocken, Wissahickon, Moyamensing, Shackamaxon, etc.
So is my territory----Wisconsin and the upper midwest. That doesn't mean millions of Indians lived here.
The tendency was historically to minimize their numbers. Of course, today, it is almost impossible to reconstruct the environment in which they lived, and hence the ecology that sustained them. They did not exist in great numbers but in significant numbers.