We have a few mobile homes for rent (minimum 5 nights). They are fully equipped with tables, chairs and kitchen facilities. You just have to bring your own bed linnen and pillows. There is bed for about 4-5 people (1 masterbed + 1 small bed)-(no water, no toilet, no shower).
Besides the daily price (mobilehome for rent + adults + children) there is a CHF 60.-- reservation and cleaning fee.