Look at camera backpacks. The compartments can be configured however you wish, due to the velcro method that they fasten inside.
I have a larger Neewer backpack for my Nikon DSLR. If I were to rearrange it, I might be able to fit my Air 2S Flymore in the bag. I rarely use my telephoto, and I keep some extras that never get used, so I'm sure I can add the Drone.
I just carry my hardcase and the DJI softcase to transfer the drone, batteries and controller into to keep from lugging around the hard case once I arrive at my destination.
For reference, I believe this is the one that I have: