Thanks for the advice!
I don't think I've ever driven far south from the burbs - once I hit cornfields for miles I got nervous. ;)
I'm originally from WI and went to school up in Duluth (and if anyone hasn't been up there, just north by Gooseberry Falls it is gorgeous, and Betty's Pies is the place to stop!) but I've never been to Door County. It's a place that comes up frequently in conversation but for some reason never occurred. I kept thinking I would have to go south to get anywhere, but you might be right with east being the way to go.