The first two legs seem to be pretty well worked out. Here's what I have so far --
Part I - Lake Michigan from Every Angle, Including the Upper Peninsula with Monica
Part II - Big Sky, Meteors, and National Parks with Debra

Oops. There's one line too many on the chart. But I have to stop and get ready to go to work so I'm leaving it for now.
Please comment, give ideas on things to see and places to stay, etc. I'd love your feedback! Where to stay in Door County? Is it worth it to go to Taliesan? Is the best soft serve ice cream really at the University of Wisconsin Dairy? What about the whole North Dakota to Wyoming trek -- are we missing some great spots? Could we do better than Murdo? (Need to be sure to stay away from Sturgis as the big Harley rally is the same time as we pass through.) Is Gillette a good place to stay?