The possibilities are endless, and nobody really knows what's going to happen. That's why there are so many different opinions, with some people sharing every idea they can think of just so they can come back later and say they were right about 1...
Staying a bit high over water is your friend. The movement of the water can sometimes confuse the sensors and you may get inaccurate readings for altitude from the controller.
If you want to fly really low just be prepared. You may have to save...