A useful travel kit starts with the shots you intend to bring home. A short walk to one viewpoint calls for a different bag from a day spent moving between locations.
Pack in the order you use things
Put the controller, phone cable if needed, and a clean memory card where you can reach them without unloading the aircraft. Check the card in the drone before leaving. A card sitting in a laptop at home cannot record the first take.
Make the return trip easier
Keep a separate pocket for used cards and mark which batteries you have already flown. Before packing the aircraft, power it down and fit the gimbal protector according to the manual. Use a compartment that holds the folded drone without pressing on the camera.