Here's a short video I took of one of the segments with the cell phone.
map:
IA-3 W/US-52 N to US-52 N/Great River Rd - Google Maps
video:
VIDEO0007 - YouTube
Skip to ~9:30 to skip over some of the boring bits. This road has *LOTS* of elevation changes, mostly in 4th gear between 45-70 mph. Road repair is so so, further north in southeastern MN, roads are 10x better, somewhat less technical (more sweepers), and no traffic.
Been on this road countless times on the bike, but first time with the car, so didn't want to go too crazy.
Anyways, this clip should give an idea of what's out there.
Total expense was ~$250 for fuel/meals, not including lodging (points).
The return trip through WI wasn't as interesting. Although the roads are plenty technical, they are very inconsistent in terms of corner design. I think if I were do this again, i'd come back through MN/IA rather than WI.