Give the plan one home
A family chat is useful for decisions, but a poor place to find the latest arrival time among dozens of messages. Create one short travel brief and nominate one person to keep it current. A shared note or document is enough. Write a revision date at the top so that everyone can recognise the latest version.
This is a working record for your own planning, not a ticket or booking confirmation. Keep confirmed transport references alongside it and use the actual booking terms whenever the two differ.
Use one row for each journey
Each row should contain the local date, collection point, destination, travellers, luggage and booking status. For an airport arrival, add the flight number and scheduled arrival time. For a hotel collection, add the full hotel name and map location. Mark undecided details as provisional rather than making them look final.
A useful example is: arrival flight, first hotel, four travellers, three large cases, one folded pushchair, quote pending. Do not add a vehicle model until it has been agreed. The brief records requirements; it should not turn a preference into a promise.
Separate the organiser from the traveller
Record who is paying or organising and who will be physically present at collection. Keep the travelling contact number in international format. If the organiser is remaining at home, make sure the lead traveller can receive and understand the confirmed meeting instructions.
Share only the information needed for the journey. Passport scans, payment-card details and medical documents do not belong in a family transport summary. Describe a practical mobility requirement in ordinary words, then use an appropriate private channel if further information is requested.
Close the loop after every change
When a flight, hotel or party size changes, update the brief and contact the booking provider through the confirmed booking channel. Editing your own document does not amend a reservation. Record the response and check any revised price or terms before treating the change as agreed.
Before departure, compare the latest brief with each confirmed booking. Resolve mismatched dates, names and addresses while everyone is still easy to reach. A short, accurate brief is more useful than an elaborate itinerary with assumptions hidden inside it.