I agree with the U.S.A side being really interesting, or more interesting anyway. I used to live just off Hwy 61 near Schroeder, MN. I travelled around the lakes lots, for various reasons and found the MN, WI & MI really good fun at all times of the year, well maybe not high summer on Hwy 61 as it gets really busy, but there are some major interesting and picturesque spots on th MN lakeside. Also try the lakeside park in Marquette MI, can't remember its proper name but it is just outside of Marquette, which is really nice and has a load of good coffee stops and cafe's.
It must've changed a lot since I left, and I know there are more gas stations than there used to be! I would be interested to see any pics that you take too.
Have a fun trip whatever you do.
Regards
Brian