Then maybe instead Tenser's Floating Disc and / or a Bag of Holding for your pocket. Because I'd much rather have that than a backpacker-school kid-style adventurer party.
The backpacks were rather large and playing, say a dual wielding elf ranger who is nimble in combat, wouldn't be able to manoeuver good in combat with the backpack. Or when an epic scene where your character comes into a throneroom, it looks like too much like a happy camper for such a moment. I think later versions fixed this with a toggle backpack option, wich is ideally the solution to your wish.
Thank you for your responses. I appreciate your suggestion of Tenser's Floating Disc and Bag of Holding as alternatives to backpacks, but I would like to point out that the Floating Disc may not be practical from a visual standpoint. Since the Disc itself is not a bag that makes loot disappear, this means that for the sake of immersion, designers and animators would need to go above and beyond to make the loot visible on the Floating Disc, making it not an as attractive alternative compared to the bags of holding, which require less effort to implement.
That being said, I agree with your point that a backpack of holding or other means of carrying loot should not necessarily look like a massive modern military or hiker version, nor should it make the adventurer look like a child. In fact, according to D&D 5th edition, bags of holding are more akin to shoulder bags, and a backpack-style design could be more practical for evenly distributing weight on the adventurer's back.
Thank you again for your response, and I look forward to hearing more thoughts from the community.
