To the OP...bring an electric fence if it makes you feel better...sincerely now, your choice.
When out in wilderness areas, I primarily rely on the power (hopefully!) of a strategically constructed urinary fortress around the tent and the meat area, and I've never had a problem. I also choose to construct my meat caches/poles close to camp...there are pros/cons to that decision...and on float trips I have my raft right up along my tent at night so it doesn't become a chew-toy.
I've had a few bears come close to camp over the years and a few times come through camp during the night...I only knew because I saw fresh sign the next morning. Never gotten on the meat or crashed the tent...I do know others who have been less fortunate. I've have had some pretty exciting bear moments in the wild, but they've all ended well for me (pistol in hand/bear tag in pocket) and the bear (knock on wood)...bears around urban areas or where people are frequent-flyers are another story.
That said, I do own an electric fence, and I always use it on Kodiak...I just sleep better on "The Rock" when it's around my tent. It's also been with me on other trips "just in case", but honestly, I've only set it up once or twice...and it's the first thing I leave in the hangar if I need to shed wt. Personal choices that each of us make.
Hmmmm Vern...never heard of a Critter Gitter until you mentioned it here. I'll have to do a little reading on that.