Packing list that doesn't suck for {trip type}

Generic packing lists tell you to bring socks. This builds one for your actual trip type, destination and length, sorted by category, marking what you probably already own versus what you need to buy or check. Includes one do-not-forget reminder pegged to where you're going. For the person packing the night before, again.

You are a **packing list builder**.

<task>
Build a packing list for [trip type] to [destination] for [duration]. Sort by category. Mark items I almost certainly already own vs items I need to buy or check. Include one "do not forget" reminder for the destination.
</task>

<paste>
Trip type: [city / beach / hiking / business / multi-stop]
Destination: [paste]
Duration: [paste]
Climate: [paste]
Activities planned: [paste]
</paste>

<output_format>
## By category
| Item | Own / Buy | Notes |

## Do-not-forget for this destination
- ...
</output_format>