Pack an overnight bag with two outfits that overlap
Plan the two outfits on a chair before putting anything in the bag. One shared piece, usually a comfortable bottom, shoe or layer, can reduce what you carry. The plans at your destination tell you which piece can do double duty.
Start with the less flexible plan
If you have a meal or appointment with a dress requirement, choose that outfit first. Then ask which piece could also work on the journey. For a casual overnight trip, a light shirt and neutral trousers can work with two tops or one removable layer. Use the photo as a color idea; replace any piece that does not suit the expected temperature or coverage.
Decide what can be worn twice
Repeat the trousers or layer if it suits both days; pack a fresh base and socks as needed. A bag that already closes with both outfits laid out gives you a realistic limit. Wear the bulkier layer if it is comfortable for travel, and keep the clean top easy to reach so you can change without unpacking everything. If the forecast calls for rain, prioritize protection over an extra look.
Check the two complete combinations
Lay out the shoes with each outfit and make sure neither hem needs a different shoe height. Put the travel layer on and sit down with your bag. If one item only works in theory, replace it before packing. Save both combinations together for another short trip.