Coming from a WY hunter, do yourself a favor and check out Kuiu! It's as good if not usually better than Sitka in almost every way, including price. It's worth a look! (founded by one of the co-founders of Sitka)
TOP: On an average day's WY elk hunt the Merino 185 is all I wear for a top layer (carry one more light base layer shirt that I wear under it in the morning and evening).
BOTTOM: Check out the Kuiu Attack Pant.
FACE: Always carry a light balaclava or face mask for evening sits/calling. Check out Kuiu's Merino neck gator.
RAINGEAR: Kuiu's raingear is awesome! Great reviews everywhere you look.
I try to avoid too many extra layers, especially when I'm having to pack everything int the back country on my back. I find raingear can be used in place of some of the DWR-type layers when needed.
LAYERS:
Top- two light long sleeve T's, PrimaLoft puff jacket & Rain Jacket (rain jacket works great for adding a little extra warmth when a puff jacket isn't needed)
Bottom- light base layer, 4-way style pant (like the Attack pant) and rain pants (rain pants can also add extra warmth if needed)
http://www.kuiu.com/ Hope that helps a little.