Thank for the advice, it turned out to be a good trip. Some decent photos, good family time. While there I did have in mind a quote attributed to Mark Twain (apparently erroneously): "the coldest winter I spent in my life was a summer in San Francisco". Mosquitoes were ok (compared to what I expected), just use plenty of bug repellent.
If anybody wants more information I'm now more knowledgeable and I plan to use this again (maybe this winter for the Grand Island ice caves)..
Here is a picture of Munising, probably a power plant.