I am on a very open area and have had poor luck with bubblers. I gave up using them.
You can definitely keep the area around your dock open and free of ice. In the spring, as the ice breaks up, when that 8,000,000,000 pound section of ice that was 200 yards away moves with the wind and hits your dock, all that bubbling didn't help a bit. People in a cove or more sheltered area would have a much better outcome.
I don't know why, there must be some parallel here but it reminded me of a Ron White story:
https://www.youtube.com/watch?v=S7Fu-v490-c