>>1724514>>1720775The type and location of the trip matters a lot, simply because you need different kinds and amounts of gear and supplies. For example, think about the differences between the equipment selection for the following trips:
>urban travel where you can get fresh food and drink from stores and can stay warm just by going inside some shop or restaurant>a three day summer hiking trip through a path that goes through a small town where you can resupply>a week long hiking trip to see autumn colors, where the temperature varies a lot and it might rain, without a chance to resupplyAs you might imagine, you need a lot more food and clothes for the last one than the first one, so you should at least know what kind of trips you're planning before deciding the bag volume.