I am also fighting otters. They have two areas near the water edge and one under a feeder that is on concrete raised platform. I have two body traps at the main hole and a box trap at the feeder. So far no luck and the larger hole with two traps is not seeing any action and the otter does not seem to visit this hole. I do not see this otter and I have not seen him for over a year. I did come up over the berm about 14 months ago and I had a glimse of him. The pond is about two acres more or less and is about 8 foot deep . I read all the threads so I am aware of what I should do if the otter gets the best of me and goes thru the berm. If I am missing any steps please let me know.