I would have no hesitation whatsoever in doing what you describe. I'd also be comfortable flying six feet above the lake en route to the location from which you want to shoot the photo.
Just don't rely solely on the altitude indicated on the...
I'm not taking video at all. Still photography only. My question was more about getting to the spot over the lake safely without losing the drone. Hence, flying a hundred feet above the lake and then lowering into a six foot position above the...