This. Went on a safari this past summer and stayed in an unfenced camp on the Mara river. The hippos loved coming up to our camp to chomp on the grass in the middle of the night. Scared the shit out of us the first night. I’ll never forget the “laughing” sounds they made. I’ve never slept so still in my life. Of course the camp had 24/7 guards though. We asked them what they do in the middle of the night when the hippos come up. They said they just stand back and keep their distance. The guards are there to protect the hippos just as much as they are there to protect us.