I actually had a similar desire to carry a 'backpack' instead of a drone BOX.
I went with the Amazon Basics Camera Sling (1 strap) and find it much more useful than a Box/Case/molded foam. I can actually carry it around and 'blend in' better than one would with a CASE.
https://www.amazon.com/gp/product/B01FRDSAYW/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1
I have all the Alpine White items in the bag (2 spare batteries, charger, hub, props, etc) and still room for at least 1 more battery & some filters that I'll be purchasing soon. I like it a lot and its awesome for $30. Amazon also has a 'model' that is slightly cheaper & bigger, but the quality of the bag is less as it uses a different material.
Nice backpack. You're right, a backpack is way more stealth and versatile IMO too. Carrying a hard case creates suspicion, especially in tourist areas where you might want to hike back into the forest a mile or so to launch the craft. When people see hard cases they wonder what's in the hardcase that needs such protection, especially if someone is hiking with one. Paranoid folks may think it's a bomb or a gun and report you to security, only to be hassled by them even when within a legal flight area, such as a national forest area. Backpacks raise no suspicions and are lighter and easier to use.
I've had backpacks for all 4 of my DJI craft, they work well. I also have a hard case for my P3P, looks like new because I never use it (it's for sale). My last Mavic used a cheap backpack from Amazon, and it worked really good, but I want the next backpack to be higher quality.
This backpack from DJI has national geographic printed on the pull straps, making it appear to be a camera backpack, which it is. So anyone that sees the label won't be concerned or alarmed, and since it's such a nice looking pack it adds more prestige anyone looking at it, never thinking it's a "drone".
So I'm curious if anyone else has bought this National Geographic backpack that can testify to it's quality and functionality, so I don't have to risk buying one to find out myself. I'm mostly curious about the zippers, are they easy to use, high quality? This is a subtle issue, but when the zippers are great, you really appreciate them for fast and easy access. The previous backpack I had for my Mavic was awesome for zipper quality and ease of use, I would recommend
this one to anyone that's on a budget, it worked great.
I could buy the National Geographic backpack on amazon for $190 and return it, then buy from DJI at $125 if it's good, but I don't like doing that. The DJI price is really good, but I don't think they take returns if I don't like it. I think DJI got a special deal from Manfrotto in HongKong.