I've never flown a drone, I understand the batteries only last a few minutes. Could you rig up a drone to fly down to the target on the 300 yd (or farther?) target, land on the ground and look UP at the target? Then shutdown or idle the motors so they don't use up so much battery and watch the target as I shoot? If you can get a $100 or so drone to do that it would be much cheaper than the $300 or more target cameras I've seen. Plus you'd have a drone to play around with at other times...