If you google earth N Como road it leads straight into (you guessed it) Lake Como. Could he have been headed for the lake?
Here's a map I found.
http://www.lakeplace.com/lakefinder/wi/walworth/como/757900
You can see that Como Road and Highway H are close to the lake. I cannot imagine why else he'd be driving there. The Lake Geneva area is full of the affluent and wealthy, not the kind of place I picture SZ hanging out - but who knows? Lake Como looks like a lot of cottages, bars and restaurants are surrounding the lake. Not the kind of place you'd go to hide bodies - this is puzzling.
Observation/detail : there is also a road called "Springfield Rd" in that area.
Jenny came from the Eugene/Springfield area two cities that are basically 1 big city divided by a freeway