This area has the largest coast for a lake in the entire U.S., and more boats per capita than any other U.S. lake. You can go virtually anywhere in a 50 mile radius by boat. You can fish, swim, ski, float, access stores, restaurants, and bars. This place is BIG fun! Check it out.
And if you want to be alone, find a quite cove or an underused state park - they are in abundance.