Myself, my husband and two kids (infant and age 5) loved our stay in Suttons Bay.
We had such a great time leveraging the private beach access right across the street from the house. The water was crystal clear, with very low waves, and while the beach area itself is not huge, it was more than enough space for the four of us to enjoy. The best part for us was that my five year old could get some time in the water (bring water shoes) without having to worry about the lake knocking him over. We loved having access to the paddle boat as well.
The house itself had enough gear for us to cook a couple of meals, sleep comfortably and the host provided some snacky food and a local bottle of wine as well as some recommendations that we tried out and loved. I had no complaints about the space, but we honestly just used it mostly to sleep and tried to be out seeing the world as much as we could as we had lovely weather and only one long weekend to enjoy it.
There were a few board games, beach toys, and a hot tub - we just needed more time to be able to enjoy it all!