Yeah........lose the bulk and lose any cotton. Avoid sweating at all costs getting to your stand. Even if that means carrying your warm layers with you to put on in stand.
I FINALLY have started to wise up and layer properly after years of shivering. The newer " Tech" style undergarments are expensive but work great.
A thin thermal layer followed by a thicker insulating thermal layer or 2, followed by a fluffy fleece, and topped with a windproof shell is about as good as it gets! and isn' t overly bulky.
Keep your head,neck, and face warm with a fleece balaclava and a wool hat over the top and you should be TOASTY!!
Obviously boots with a good layer of insulation AND SOME ROOM INSIDE combined with a poly pro liner sock and a good wool sock should keep the feet warm, and a Thermal treestand mat will even ad to the effect. (I picked one of these up from " Len in Maryland" for my Summit...great little investment)

For your hands a pair of Fleece or wool " Glommits" are the ticket........gloves will NEVER be as warm as mittens but mittens make shooting a bow pretty difficult![&:]

Finish the whole system off with a few of those activated handwarmers to slide into inside pockets and you are set. There are shirts made with pockets for these handwarmers placed in strategic spots such as the kidney and chest area.