I have just completed a circumnavigation of the Great Lakes in the FSX
default Cessna 172. Start- and end-point KMDW Chicago Midway,
direction of travel was clockwise because I figured that prevailing
winds would probably be westerly and I wanted favourable winds across
the Canadian shores of Lake Superior and Lake Huron where the FSX
scenery is sparser. On the way, I added detail to most airports which
I had not already done on previous journeys such as my Trans-Canada
Highway trip a few years ago.
I did the 34.7 flying hours in 38 legs which varied in time from 21
minutes (CYGK Kingston ON to KART Watertown NY) to 1 hour 28 minutes
(KDLH Duluth MN to CYQT Thunder Bay ON). I stayed in visual range of
the lakes for most of the trip at altitudes from 2500' to 7500'.
Tailwinds across Ontario were up in the vicinity of 35 knots which
vindicated my clockwise travel decision.
FSX real weather was used for the whole trip, but because I set my
time by South Australian local time (UTC + 9h30m) whilst I was flying
in daylight, the weather conditions were really those in the American
and Canadian night and therefore I had misty or foggy conditions
during legs in the Toronto and Michigan areas. (Why is it always misty
around Toronto Pearson whenever I fly there?)
I don't know how my experience would compare to a real-life trip, but
I found it interesting.