Looking for opinions on upgrading base layers while hunting in extreme cold, these past two years have really changed to hunting in more extreme cold and I am in need of new long underwear, both bottoms and tops. Currently I wear a pair of under armour cold gear bottoms and top that must be at least 8-10 years old, they are amazingly in good serviceable condition with only minor pilling issues in the crotch area of the bottoms. Was given a Cablelas gift card for Christmas so I purchased the Cabelas ECWCS heavyweight grid fleece base layer bottoms. I also decided on and ordered the LL Bean Cresta Marino Wool midweight 1/4 zip base layer top. The problem I have in extreme cold weather is long distance hikes into remote areas where you really work up a sweat and then need to sit for long periods of time once you get to your targeted area. You need to be light weight as possible while hiking in or following track in snow. My go to outer pants is traditional mid weight wool pants (I like and use the Big Bill medium weight). I also own a heavier weight Woolrich Malone wool pants, but prefer not to wear them on long distance hunts as they are too heavy and cause overheating. When going on long distance hunts I really don't like carrying a pack, too much weight and interferes with a quick shot while still hunting, although I realize that it gives you the option of taking off layers or adding more layers depending on whether you are walking or on stand. As far as the upper core chest/torso area i typically wear a base layer with a chamois shirt or fleece shirt and then a soft shell jacket with option for lighter or heavier weight. On top of all the upper core wear I put on a fairly heavy duty Cabelas orange flourescent vest with plenty of pockets to carry all of the necessary equipment to include flashlight, rain gear, rope, flagging tape, deer drag etc. So my thoughts are that I could reduce weight on long distance hunts with a fanny pack, much lighter weight outer shell jacket with upper shoulder flourescent orange cape only. Do you think I made the right choice with the base layers?