Yes. There's a great book you might want to check out called Masters of Empire about the Anishinaabe people, they include the Ojibwe, Odawa, Algonquin, Mississaguas among others. The book is by Michael McDonnell. It's a fascinating book that explains their extensive trade networks, their conflicts with their neighbors and how they played the English, French and Iriquois off each other to protect their interests.

But they're trading networks went all the way down the Mississippi and to the coast. They'd have access to salt from the salt mines in Southern Illinois and the various salt creeks like the other poster mentioned, but also from the Hudson bay and hypothetically, if it had been necessary, from the gulf coast.

There's a new book that came out last year called Seeing Red by Michael Witgen that picks up after the period described in Masters of Empire that looks good too, if you're interested in this area of the world.

Here's a great talk with McDonnel at the James Madison lecture series. https://youtu.be/bodjl3rXWxw