Cal, Will try to answer your questions. Never have been to the Yukon or the NWT, so no clue about the size differences. However, the guide I hunted with in Alaska, commented that the truly big ones are in the Yukon. However, were we were hunting was about 60 miles from the Yukon border. Like Gary commented on, absolutely no pressure to shoot the 1st ram you see. The 1st ram we saw was a ram that they called crooked horn. one side was about 40 plus, the other side was deformed and had started growing into the rams face. He had obtained legendary status, after a couple of close calls with hunters over the years. Actually, the guy who cancelled on his trip, which I hunted on, had booked specifically to hunt this ram only. The guide really wanted me to shoot this ram, and it would have been a relatively easy stalk and shot, but wanted one with two good horns. My passing on that ram had no effect on my guides determination to get on another. Re your question about being encouraged to shoot the first legal ram. I think this has to do with the rough country and most hunters are not prepared to get after it, after a couple of days. Also, the sheep are as wild as can be. If they even think somethings up, they were gone, like smoke in the wind. The good news is lots of rams. We put on hunts every day on rams, just something would go wrong. We hunted one group of 16 and the bunch I got my ram had 13, with about half of that bunch being legal. We hunted other rams from a single to groups from three to five rams. My ram had horns a little over 36 inches and had bases over 14 inches. We busted a** for 8 days. I'm glad I did pass on the ram they called crooked horn, because it would have been over the very 1st day. My 1st trip to Alaska and my very 1st sheep hunt was just like the Jack O'Conner stories I read almost every day when I was a young pup.
I hope this answers your questions, and if looking for a great dall sheep hunt, the Ellis crew is 1st rate. Kirk and his brother are excellent pilots, have great country, with a crew that will hunt as hard and as long as the hunter wants to go.
Woody