On the day when Traverse City rentals were closed (15 kts was too much wind for them), I rented a 14 ft American Day Sailor for myself and my daughter. The boat was impeccable, reasonably fast and nimble, yet stable enough under its two sails.
The lake is just large enough to get a taste of sailing without the big swells of Lake Michigan nearby.
The price was reasonable, the staff was very nice and helpful - they even jump into the water to spare you maneuvers at the dock. A perfect experience.