Grand Traverse Bay has some great sailing. I''d suggest:
-staying at least a night in Suttons Bay
-staying at least a night in Northport
-anchoring for an evening or two at Power Island
-anchoring at Old Mission
-spending a day or two in Traverse City
-Elk Rapids also has a brand new Marina, great little town.
-Charlivoix/round lake is great
Lake Michigan levels are very low, be careful and watch the charts
. If you cross over from West Bay to East Bay, DO NOT cut the corner at Old Mission Point. You will have to go several miles out but it will be very shallow (as in rocks)inside of the light.
Remember, even though it''s a Bay, it can get ugly. A gust front several years ago knocked down several sailboats, two sailors were never found. Lots of sheltered places to hide if you need.
The water rivals the Carribean for the intense blues.