Most often it is shared by two or more rental houses or with the owner living on site. In most cases you are expected to bring your own sheets and towels although often they can be rented from the owners. Near Niaux cave. In France you'll see apartments referred to as T1, T2 etc. The number indicates the number of rooms, excluding the kitchen, thus T1 is a studio, T2 a one-bedroom and so on.
Some sites have caravans or mobile homes for rent to holidaymakers.