Michael,
Very good article and great advice. From my sheep hunts I would say that I've found the two most important articles or items to have along are: First, the best pair of boots you can afford. Boots that fit well and are adapted to the country you will be hunting. Boots like the Lowa Sheep Hunters for example. The quickest way to ruin a hunt is to have ill fitting or improper boots for the rocks and scree, etc. The second item of gear is pair of trekking or hiking poles with baskets on the ends. These will save your ass in numerous situations and make getting up and down the mountains, safer, easier and save wear and tear on the knees. I won't go on any sheep or goat hunt (or most elk or
mule deer hunts) without them.
I agree that sheep are not difficult animals to stop or kill, so many flat shooting rifles including the .243 is an appropriate caliber for sheep. Although sheep are easy to stop, some of the other critters that inhabit the same country are not. Therefore, in choosing a suitable Dall "sheep" caliber I would definitely consider whether I could be encountering an angry brown bruin in an alder thicket and whether something more akin to a .300 win mag or equivalent with 180 Gr. premium bullets like a TSX or Partition might be overall a good choice for Dalls.