Some of the best places to start are Day One Camo for the ASAT wool bibs, KOM, Grey Wolf Woolens and Filson olive drab bibs.
I too suggest uninsulated, but buy them big, like one size plus bigger. From there you can hem if needed.
In really cold temps, anything other than wool or fleece can make noise. But if in northern cold temps, fleece doesn't do nearly as much for you after temps dip below the 20's. If with typical traditional archery short ranges, anything other than wool in the bitter calm of a 10 degree day is going to make noise. Cold temps bring out the noise in everything, from stands to boots to gloves.
I have some of all of the above mentioned companies products. Pound for pound and dollar for dollar, the Day One ASAT wool outfit/head to hem, offers the some of best all-around late season coverage. Not just for staying warm, but by late season, the ASAT really blends in like little else. The KOM grey and Grey Wolf Predator are a very close 2nd for late season camo. The Filson olive drab is great stuff, but you should be in a like background, with either evergreens or big logs/blowdown, since the olive "blobs", especially late season.
Now, the wools mentioned are not cheap. If cost is a make or break issue, there are some good fleece options, but I'd also suggest making sure you have lots of room for layering.