Head to the Hart-Silver Lake/Mears area of Michigan, and plan to spend some time at the Whiskey Creek Public Access Beach. You're sure to find a quiet place to relax at this beach that's separated from the parking area by sand dunes.
Consider John Gurney Park on Hart Lake near the downtown Hart area.
Consider Covert Park Beach if you're closer to South Haven or St. Joseph in southwest Michigan.
Take your pick of quiet beach areas in Traverse City, especially if you head a little bit out of town to the beaches at Elk Rapids.
Consider West End Beach at the end of Division Street if you'd rather just stay in Traverse City.