You sound like you are well onto the right track.
You like your boots so that's good.
Are they a size bigger than needed to allow for extra socks without being tight?
A guide I know in Northern MN. buys his boots 2 sizes bigger than needed allowing plenty of room for several pairs of socks.
I know some smart socks use different components.
Have you tried Merino wool socks?
http://us.icebreaker.com/en/why-icebreaker-merino/what-is-icebreaker-merino.html You can usually find some place running a sale on them. The site posted was just because of their explanation.
http://gerbing.com/ would be another choice if you wanted to try a heated sock. I have no personal experience with them just a few positive reviews. I do know their motorcycle vests work as advertised.
I have also heard that rubbing cayenne pepper onto the soles of your feet is supposed to get blood flowing. You are on your own there.
Food in the belly and hot liquid goes long ways! I guess so does seeing the bobber go down!
Good luck!
Cold feet suck! Period!
WS