Carry-On Only: Pack for Two Days Like a Pro

Checked bags are a tax on a short trip. Tell it the season, the destination type, your activities, the forecast and what you will have access to, and it gives you a full packing list by category, with each item earning its place. One nice dinner, a swim, a day of walking: all covered, all in the cabin bag.

I'm doing a {SEASON} weekend break to {DESTINATION_TYPE} (e.g. city, beach, mountain) and I want to travel with carry-on only, no checked bags.

The trip involves: {ACTIVITIES} (e.g. one nice dinner, daytime walking, optional swimming). Weather forecast type: {WEATHER}. I'll have access to: {LAUNDRY_ACCESS} (e.g. no laundry, hotel hairdryer only).

Give me a complete packing list grouped by category. For each item flag whether it's essential or optional. Then identify the three items most people over-pack for this type of trip, and the two items most people forget. Finish with a layering strategy if the weather is unpredictable. Keep the total item count under 25.