Learned the "don't shoot a big moose on a sheep hunt" lesson on my first Yukon sheep hunt as well back in the mid 1990's.I'm in that boat, yukon stone sheep hunt, and i'm going back to try again. It was of no fault whatsoever of the outfitter or guide, we busted our asses for 13 days and I've been there before, they have the sheep and a great success rate.
First mountain range we knew something was off but stuck it out a few days and evidence led us to believe wolves had been in there. We moved ranges, saw over 100 sheep, a few around 8 but no shooters and decided to go back to first range. It was a whole different place 10 days later, found 2 mature shooters on day 11, had the shot but wind was howling & wanted to be 100%. Thought we had them dead to right, as we moved in we got weathered out in moments, along with the rams retreating to the cliffs below as the weather blew in. We couldn't see 30ft sometimes. Stayed that way for the remainder.
I also probably shouldn't have wasted a day shooting a moose as we moved ranges but it was too easy not to and we'd been seeing him daily from up top.