My family and I visited Windy Harbour during the first week of Spring. There were 6 of us. We really loved Judith's place (Sheerwater). It has a fantastic ocean view and it was located in a very strategic location (close to the national parks, Mt Chudalup , Salmon beach, Cathedral rock and Tookalup).
The house was very cosy and comfortable and it had all the basic needs for a short 3-4 day stay. In fact, the accommodation had a very Vintage style to it, which made it even more attractive. It felt very homely and by the end of my trip, I was sad to leave. After the first night, we became more familiar with using the generator and filled up the petrol whenever necessary.
*Be sure to turn off the generator when you're not around or when going out!
I would recommend this accommodation to those who prefer a simple and decent stay with basic facilities, especially for those who will be moving in and out often. Loved it myself and I would come back :)