Yes, be sure to take some very warm mid layers. I was up there from Aug 28 to Sep 8 and the outfitter said they had never had so much cold and snow so early. I focused on everything being ultralight and left a couple of key pieces of of mid layers that I normally wear during whitetail season at home because I thought they would be too heavy/hot up there....boy was I wrong.
Also, take a small 3x5 notebook and a pen, and keep a journal every night before you go to bed.
Good luck!