Make mobility the first constraint
Choose boarding stations, arrival times and classes around the slowest traveller. Avoid unnecessary footbridges or short transfers where possible.
Requests are not guarantees
A berth preference or quota request can improve planning but may not guarantee a specific berth. Recheck the final allocation and prepare a polite swap request if needed.
Carry a compact journey kit
Keep medicines, water, identity documents, emergency contacts and essential food accessible rather than deep inside large luggage.