Start with who carries the driving load
The key issue in Xinjiang is not whether you can drive. It is whether one person still has energy after several long road days to care for the rest of the family. In a self-drive trip the driver handles navigation, speed control, parking and city access. A private car removes that load.
Think about stop frequency, not just distance
Family itineraries usually include many short stops for viewpoints, toilets, snacks and photos. In a self-drive plan you must decide where stopping is legal and safe. A private car suits a more flexible stop-and-go rhythm.
Families with seniors or children benefit more from a driver
Seniors need easier boarding, pacing and room for changes. Children need breaks, snacks and extra items close at hand. When the same adult must also drive all day, the journey becomes harder to manage.
Luggage and multi-city logistics matter more than expected
Seat count alone does not determine comfort. Large suitcases, child items and daily bags quickly fill the rear space. Once the trip includes multiple hotels or several cities, a private car is usually simpler to keep organised.