The real cabin disorder usually comes from small high-frequency items, not big luggage
On a multi-day Xinjiang route, large suitcases are often moved only once or twice a day. The items that create daily disorder are the smaller ones: tissues, jackets, sunscreen, wipes, cables, medicine and rubbish bags.
Because they move constantly between hands, seats and bags, they create far more friction than the large luggage does.
A quick-access bag works because it turns repeated searching into one repeated action
When the same high-frequency items always live in one quick-access layer, everyone knows where to reach for them. That means less searching before stops, less clutter on seats and fewer repeated questions about where something went.
For family groups, this matters even more when adults are also helping seniors or children.
Only put light, frequent items inside it
The strongest quick-access bag holds tissues, wipes, sunscreen, charging cables, masks, light medicines, rubbish bags and perhaps a small drink layer. Bulky or low-frequency items should stay elsewhere.
If the bag tries to become a second storage bin, it quickly loses its purpose.
Its value drops only when the route is very light and item use is minimal
If the group is made up mainly of adults, carries very little and rarely needs things on the road, the difference may be smaller. The more frequent the stops, care needs and item requests, the more the bag earns its place.
On longer family-focused Xinjiang trips, it is usually more useful than travellers expect.