An historical article based upon travelling to Michigan in 1846 found in Michigan History, Volume 5 gave advice to subsequent travelers:
"Bring dry yeast -- you can't get it on the road... ."
There was also a description of the "mint industry" found along the way: "In Florence they raise mint, each farmer stills his own oil and sells it to New York agents."
Here's a Food Timeline, 1846-1849.