On the small stocked alpine lakes, I have found the same thing as you have, mediocre, lethargic trout. In the winter, even a large trout will feel like not much more than a fingerling. Have you tried nymphing the larger rivers? Have you tried dries and streamers on the more remote streams and lakes? My personal best trout was in Wyoming and I fought it in a fast riffle on 5x tippet for 20 minutes before bringing it to net. A 30lb Albie didn’t give me that much of a rush. Late in the spring run off or in the fall I’ve had 16” trout fight nearly as hard as my personal best. If you’re in Wyoming and finding that carp give you the most thrilling fight, you’re fishing in the wrong part of Wyoming.You're right Lando, I have not caught a large trout on a fly. Most of my experience is with Redfish, Specks and Bonefish. Never been to Alaska and don't plan to. Our trout here in Wyoming are on the smallish side.