Vancouver Island has some big bears but if you look in the record books you'll see that Prince of Whales in SE Alaska produces some real monsters too, and you don't have the hassles of taking firearms in to Canada. Go to the Alaska Hunting Forum and ask around http://www.outdoorsdirectory.com/akforum/akhunting/index.htm
All my hunts are self guided so I can't recommend a guided outfit from my own personal experience, but RDM Outfitter has some great drop camps.