When to go
Generally speaking, the warm months are mid-June
through mid-September. Winters are long, there can be a lot of snow, and it can
get very cold up there. Snow can happen in mid-September. Sometimes the ice
doesn't go out of the lakes until mid June or even late June.
The days are very long during May, June, July. So if you want to cover a lot of
distance and yet not miss seeing any of the road, those would be good months to
travel up in this region (June 21 is the longest day of the year). By early
September the days are noticeably shorter.