For hunting Dall sheep in Alaska you should use windproof, breathable and warm clothing. Light, warm jackets and trousers with membrane and insulation lining have proven their worth. Also important are fleece jackets or pullovers, warming functional underwear and a mosquito net for the head. In addition, you will definitely need well-worn, ankle-stabilizing footwear with a non-slip tread sole and above all a waterproof membrane. A good, waterproof backpack with chest and pelvic straps as well as a light sleeping bag, preferably with cover, and insulating mat complete the equipment.
Choose a robust bolt action rifle with a powerful caliber (6.5 x 68, 8 x 68 S or all .300 calibers). Since the shooting distances in mountain hunting are often longer, the variable target optics must have a high magnification. The twilight performance is not decisive here, as you hunt during the day. In addition, you should take with you light binoculars with at least 10x magnification, a range finder and a spotting scope.
You should pay particular attention to the quality of all your equipment. In the wilderness of Alaska there are sometimes adverse conditions and poor quality quickly becomes noticeable under these conditions.