That is my typical way of working with I travel with Kim. I setup one camera on a tripod on auto-pilot mode (magiclantern timelapse feature for the less romantic folks), and get many cool wide angle shots (including some nice behind the scenes pictures when I get in the frame).
Once done, I move around using a second camera. In this specific case, the camera on the tripod is mounted with a 18mm lens, while I shoot with a second body at 85mm, extremely close to the water. I keep a distance of about one inch about the water, gently following the waves, and keeping my focus on the beautiful dancer.
This picture is created from that shooting: https://www.instagram.com/p/BBdWyoHzPnK
That's scary, but your final images prove it's worthy. Great job.