Nick, a few suggestions to build on what others have provided:
Separate your clothing into those which you’ll leave at Base Camp and those you’ll use at Spike Camp. I’m not familiar with each of the Sitka items you have listed so I’ll generalize the clothing description. Clothing is the heaviest of all the items and people generally pack too much.
Spike Camp clothing would mainly be made up of those you’re wearing or go in your backpack. Wear: underwear, long sleeve t-shirt, pants, liner sock, cushioned sock (Smartwool), gators and boots. In a ziplock bag, carry extra set of liner and cushioned socks. Long Underwear bottom/top, Fleece jacket, Puffy coat, Rain Gear. One pair of lightweight gloves, stocking hat, baseball hat. My assumption is you’ll be on the move when getting to spike camp as well as when you’re glassing goats. If you have it in the budget, I’d suggest a pair of Kuiu zip off bottoms so you can add/remove them depending upon conditions.
Gear: Micro spikes/Instep Crampons, Trekking poles, headlamp, bino harness, moleskin, Havalon w/blades, license/tags, parachute cord, electrical tape for gun barrel, toilet paper/baby wipes, binoculars, range finder, spotting scope/tripod. Check with guide regarding the game bags or if he’s bringing them. Sleeping bag in a Sea-to-Summit eVent waterproof, compressible dry bag, sleeping pad. Rain fly for your backpack as well as take a garbage bag to line your pack and another to separate your gear from meat/cape. Some type of Nalgene water bottles. Anything not waterproof should go into ziplocks…phone, camera and wallet.
Base Camp would consist of all the other clothing items you have listed. Having a fresh pair of underwear, long sleeve t-shirt, long underwear top/bottom and fresh socks, clean pants are nice to have when you return to base camp and stroll around in your crocs. Compression bags are great to keep clothing compact and the Sea-to-Summit eVent compression bags are also waterproof.