I hunted Stones in 2015 with a neighboring outfit to the east and we didn't see a ram even close to legal in 14 days of hard hunting. I've been told, and I think in general that area of BC has declined in sheep numbers. I have also heard that the there is an onslaught of resident BC hunters who are taking a significant tole on Stone Ram numbers in many units.
As was mentioned, Bluestone used to be one of the premier outfits up there, but I've not heard anything about them in recent years. To me that suggests that perhaps it is not as good as it used to be???? but that's total conjecture on my part.
If I were interested in them, I'd contact Bluestone and get a list of recent clients (successful and unsuccessful) and get their take.
Best of luck.