This template keeps a trip in one place. The Itinerary tab has one row for each plan, with the date, city, time, booking reference and cost. The Packing list tab has a tick box for each thing you need to take, grouped by category.

The Dashboard shows the total trip cost, the number of plans and what is still to pack, with a chart of cost by city. It comes with sample data. Make a copy, then replace the sample rows with your own trip. Formulas, dropdowns and charts update on their own.