You open Google, type “travel itinerary template excel”, and get 50 results. Most are free spreadsheets with columns for date, time, activity, cost. They look clean. You download one. Then you fill it out on your laptop, print it, and realize you can’t edit it on the road. Or you lose the paper. Or the Wi-Fi at your hotel is terrible and you can’t open the file. Here’s the truth: Excel is the wrong tool for most trip planning. It works fine for a budget spreadsheet. But for a day-by-day itinerary that you actually use while traveling? It fails. I…