Yep, quite a bit of experience with electric fences in bear country (all in Alaska). I've used them for work in SW AK in high brown bear density areas and on hunts in the Brooks Range. Best advice I can give is the fences are a great tool but they're not an excuse to disregard other standard precautions for camping in bear country. Keep a clean camp, store food properly, etc. Generally, I'll set the fence up around the tent, raft, gear and keep it that way until I harvest something and have meat back at camp. Then I'll make a meat cache some distance from camp in the open and put the fence around the meat.