Villa 1 has 4 bedrooms, 6 beds, with 1 toilet and bathroom in-house, as well as 3 toilet and bathroom outdoors. It also has an equipped kitchen, porch, dining, and living area.
Villa 2 has 1 big bedroom on the second floor, with 2 beds and huge balcony overlooking the lake. It also has 2 toilet and bathrooms, dining area and equipped kitchen
If you want to occupy the whole island exclusively for your group or family, you may then take Villas 1 and 2. If your group is more than 20, it is natural to occupy both villas and so the island is automatically for your group alone.