Insurance in the case of drones is money well-spent. Don't know what insurance options there are in the UK, but BUY IT! Check the laws and reg's in each of the countries and locations you intend to fly. One other important thing is to buy at least 3 or 4 SD cards and switch them out between flights. My biggest concern is less about losing the drone (I got insurance) than losing footage. Transfer files to storage and upload to the cloud if at all possible.
The most important thing with editing is not about editing... it's about capture. You can't fix bad footage in an editor. If your footage is bad because of:
Failing to adjust drone, gimbal settings to soften movement of both
Failing to set proper video and photo capture settings
Not having ND filters to capture at the proper shutter speed of 1/50, 1/60 (24fps and 30fps respectively)
Failure to set proper exposure and white balance
Before you do your epic travel journey with your new drone, practice a lot. Learn how to use the intelligent flight modes. When you view your footage in post, think about what you should/could have done to improve the flight and footage. Anticipate the moves and use of gimbal. I get the most drama in footage from gimbal tilts.
One of the most common issues I see with drone videos is jerky movements, particularly yaw. Until you can consistently fly a VERY subtle sweeping turn with only the lightest lateral movement of the left joystick, FLY STRAIGHT. A straight ahead/back flight that's slightly off your intended target line always looks better than making a course correction mid-clip. If it's an epic shot and move you want to get just right, do multiple takes.
The best moves are a combination of inputs, most importantly the gimbal tilt, IMO. Gimbal tilt down looks best with an increase in elevation and vice-versa. Make sure you drastically soften the gimbal settings, otherwise it looks as bad as a course correction.