Not sure if this will still be an option as this was from 2017, but when I planned a backpack trip this was an email I got from the Alger County C of C. This was a very nice map and it was quite large. Here is a copy/paste of that email. Maybe you could email or call. I actually had some pictures that I took of the map (attached).
Kevin:
We had to purchase the current map we have available. It covers the entire central region of the UP (east to west from Paradise to Marquette, north to south from Lake Superior to Lake Michigan) and is printed on a waterproof/tearproof paper. It has all of Alger and Schoolcraft counties and much more. The gas stops are marked as are any restaurants, pubs, etc. that advertise on it. As I said, we had to purchase them. If you would like to purchase one for $7.00 we can put it in the mail for you. If interested, please supply your mailing address and cc information. You may phone in the info, if more comfortable, to us at (906) 387-2138. Good detailed maps are getting hard to find, that's why we chose to go with these.
Thanks,
Pat Sanderson
Alger County Chamber of Commerce
(906) 387-2138