A day-festival bag needs a different approach from luggage for a camping weekend. It should keep necessary items accessible while remaining manageable for several hours. Start with the particular festival’s rules and remove anything that does not serve the day you have planned.
Establish the permitted bag first
Check size limits and rules for bottles, food, rain protection and electronic equipment. Conditions vary between events. An otherwise useful object is a poor choice if it is not admitted at the entrance.
If personal requirements call for an exception or particular storage, discuss this with the organiser in advance. Keep any confirmation accessible. Do not assume that a general packing suggestion overrides the actual admission rules.
Pack for access as well as weight
Keep the ticket and any required documents easy to reach. Position weather-related items so that you do not need to empty the entire bag onto the ground. Small belongings can stay together in separate compartments.
Check your phone battery and any permitted charging option. Save essential information offline so that every attempt to orient yourself does not require a connection. A supported offline ticket is different from an arbitrary screenshot; follow the ticket provider’s instructions.
Companions can distribute shared items between bags. Personally essential belongings should remain with the person who needs them, however. Separating later should not prevent someone from accessing necessary items.
Carry the fully packed bag once
Before leaving, briefly carry the fully packed bag. Can you reach its closures, does anything interfere with sitting, and is there room for a removed layer? This simple trial often identifies unnecessary items more effectively than an ever-growing list.
Unpack after the event and note what you actually used. Unused rain protection was not automatically pointless; distinguish a reasonable contingency from an object without a clear purpose. The next bag can then be more deliberate rather than merely smaller.
Try an access check
Before leaving, retrieve the ticket, rain protection and essential small items from the packed bag without removing everything else. If this does not work, rearrange the compartments. The check needs no extra equipment and reveals whether frequently needed belongings have disappeared beneath rarely used reserves.