Here is my first video (3:43) flying in Nance Canyon with the Mavic Pro 2 drone (shown below), with Gail as spotter using binoculars. After about 400 feet out, even against a clear sky, the drone is impossible to see unaided.
The video is 4K quality and too big to upload directly, so I have embedded the Youtube video (4K) below the drone photo. Please watch full-screen.
I picked out this spot to fly because the land slopes down rapidly to the west, making obstacle avoidance easy. The entire flight was at a height of only 20 to 30 feet above the take-off point, and I just flew straight out from there. Please enjoy!