The guys with bee hives in the area also fence them. Its the only way. When we first bought the property, there was an area that just needed cleaning up and I put a small orchard in. To keep the trees safe from deer, I fenced the whole area, just about an acre. I went 8' high and started 5" off the ground. Every wire was hot until it got to 5', then every other was a ground. All wires 8" apart. It worked REAL GOOD and no problems with the trees.
When the trees were large enough to make it without the fence, I remove it and gave all the wire away to a friends boy, who for 4H was raising calves. He had a charger so I sold mine in a garage sale. Yup, I needed it and had to buy new, again.

Bear hasn't been back, but if he does, the game camera might catch the "moment" LOL