Like flags, I'll usually have a spotting scope in my truck, especially when hunting pronghorns. I've never carried a spotting scope in the woods on elk hunts, and I don't remember carrying one on my sheep and goat hunts. Just too much extra weight, especially on solo backpack hunts.
My Nikon Travelite II 9x25 binocs however, have been with me on many elk hunts, to the tops of many sheep mountains, and on multiple international hunts.