Arm yourself with weapons and protection hidden in the locations, defend the island from strangers. And an unfinished construction site and shipping containers will be a great shelter for you. After all, no one knows this island better than you do. Defend your island in self-defense or team-to-team mode.
What could be more serene than your own island in the ocean? Yes, anything if armed enemies landed on this island. There is nowhere to run, you just have to have the courage and show the outsiders who is in charge here.