My old neighbour built what he said was the best bear proofer for his hive. A rectangular box made of 6 inch logs for its edges and then used chain link fence to enclose the box. The hive sat in the middle over a foot away from the fencing on all sides.
We cannot change the waves of expansion and contraction, as their scale is beyond human control, but we can learn to surf. Nicole Foss @ The Automatic Earth