I presume that you are talking about Idaho but there is also a Priest Lake in Oregon.
I also can't help you too much other that to tell you to walk the logging roads glassing the open meadows with a lot of green grass in them. The bears will be out grazing on the grass and that may be your best bet to find them.
If you're talking Idaho then you should really look into baiting. You should have 3-5 bait sites. Using baits will increase your odds greatly. Spot and stalk is great and all but if you really want a bear, baiting or dogs is the way to go. They do require time and dedication though. If you use trail cameras you will be able to choose the bear you want to go for and elimate sites that have sows with cubs or smaller bears. Of course, I'm assuming you can bait that area. I've never hunted that far north.
If you choose to spot and stalk, keep an eye out for sign that bears are in the area. Scratched trees, torn up rocks, and logs. Hope you have a good set of optics and lots of luck. Especially luck.
Also, if money is available you could find someone to put the baits out for you and upkeep them.
Hopefully you are already doing some of this. I'm not baiting this year but friends I have started weeks ago.
Hunting can be slow and frustrating if Mother Nature throws a warm hunting season at you. But things can take a drastic turn for the better with the onset of a cold snap. Whether you get snow or just a good, prolonged cold front, the hunting can improve on a dime. But cold whether can also make certain parts of the hunt more tedious. Here are some things to keep in mind when your prayers for cold weather finally pay off.
You can see a your quarry's breath when it is cold outside...