Mike Kim , Jul 15, 2003; 12:58 p.m.
It sounds about right, but your window period is a bit too narrow. Peak fall color starts usually around end of September to middle (or end) of October in northern to middle of Wisconsin. For a given year, there can be as much as one to two week variation of peak colors between northern part of WI to southern WI. Door county does offer attractive fall colors, but I found Devil's lake state park more fun to shoot. It offers various rock colors (black to gray and even red rocks) and you can really hike up and shoot from the top of the peak (a fish-eye will be a good lens choice from the top).
As far as comparing Lake Superior to Door County, you are not comparing the same quanity here. It is not a comparison between apple and orange, but more like comparing apple and orangutan. Door county is a tiny spec around the Lake Michigan, where Lake Superia is larger than Lake Michigan. Given a choice, I would recommend the Mckinac Island (Michigan) in northern part of Lake Michigan. It is about few hours north-east from door county, but they offer old-England like town (Victorian-style town) for many photo opportunities.