Isaw my first B.C. Black Bear around 1952 and my first Grizzly in 1956 and have had hundreds of encounters with Blacks and about 60 with Grizzers since. I am a retired bush forestry guy, project supervisor, fireboss, lookoutman and have spent hundreds if not thousands of nights alone in the most remote wilderness of B.C. and western Canada.
I backpack and have since 1956, I am careful about bears and will sometimes hang my food, etc, however, I only carry the bare minimum of clothing and live in the same clothes, except socks and gonch for the duration of my trips. I cook where I camp and, quite honestly, do not worry much about bears.
Your REAL danger where bears, especially Grizzlies are concerned is surprising one or more on a trail, especially near a kill they are feeding on. To avoid this, learn to watch the Crows and Ravens or Magpies in the Okanagan and perhaps carry a small airhorn of the type used on boats; use this when entering vision restricted areas to warn bears of your presence and give them a few minutes to move on.
We had a Grizzly hanging around our waterhole in the South Chilcotin in Sept., 2007, when my buddy and I were packed in by horses on a hunting trip. He came into camp about 02:30 one night and awoke my buddy; I woke up, shone my LED flashlight on him and told him to, well, there are ladies here….
He was just curious, as they are and not aggressive, we both had heavy rifles and are good shots and I was not too worried. This is one of VERY fEW times in 45+ years of camping that I have ever had a Grizzly enter my camp, they usually avoid people…I think that they hold us in a kind of contempt…….
If, you are really concerned, buy one of the 2.5 lb. electric bear fences and an airhorn. These have a very good rep. and I am getting one for my base camp to protect my substantial investment in gear as soon as I can afford it.
You know, I have dozens of highend rifles, a .44Mag. and carry permit, three custom-built Grizzly defence rifles and lots of close-up experience with them and I HAVE NEVER had a difficult time with one, not even once and that includes running camps of nearly 100 workers in various parts of B.C., in tents, lots of young women, funky "granola muncher" food and so forth.
Relax, be aware and the chances of being mauled in your tent, at night, with the exception of habituated park bears are so slim that worrying about it is more likely to cause your demise by a coronary!