Hello...I'm new to the forum and archery, so don't have much to contribute just yet just lurking around learning. But boots is one thing I have some experience with and thought you might benefit from my experience.
First off, I have very large feet. Well more wide than long. So I have to hunt for the widest boots that a store carries. Before I got my rubber boots, I was using a very nice pair of insulated leather workboots. Well, after slipping, sliding and falling more times than I cared to remember, and getting my feet soaked in ice cold water walking through bog, I bought the rubbers.
What I got was a pretty cheap pair that was rated down to -40 degrees Celcius. I think it was just $49.90. The main thing to me was that this meant the material will not harden in the cold and give me good traction on snow, ice and frozen grass/bush.
The key to warm feet though, lay in these little things called Bama Sockettes. I heard about these from tree planters in the BC wilderness. They frequently need to work in wet and cold conditions high up the mountains and apparently, they swear by these Bamas.
Well gents, I have to say they do. At my last hunting trip, every other guy around me was complaining of cold feet. We were hunting Moose and were very high up the mountains with strong cold winds and wet soggy terrain (well you know what Moose likes). I wore wool blend socks next to my skin, the Bamas and then the insert of the boot.
My sockettes were always wet on the outside only. Don't know how they work, but I guess those tree planters know what they're doing! Inside, my feet were always dry. Hope this helps!