Hunting over bait isn't my favorite past time, but if the goal is a big bear in one trip, northern Alberta is the place I suggest. Ten years ago, I hunted with WL Guide Services. While I shot a nice bear (6 foot, 8 inches head to tail), another guy in camp shot two monsters, one being an 8-footer that was way bigger than the average grizzly killed. I didn't know blackies got that big.
W&L Guide Service is a full service outfitter operating out of Northern Alberta, Canada. We are famous for our world class black bear hunting.
wlguides.com
For spot-and-stalk, the ID or MT backcountry is a blast. It's physically hard and trophy size is much smaller, but if you're fit and enjoy adventures, it's a hunt you can do every year for cheap. For the money, spring bear hunts in the Rockies are hard to beat.