Jamie,
Take a tip from "El-Cheapo" LOL!!!!!
Big Bulky Wool Sweaters!!!!!
Cover everything with tight weave cotton camo!!!
I have sweaters from XL - XXXXL... Start small(XL) and layer with larger sizes as it gets colder.
For your legs... A pair of HEAVY Wool pants,with a pair of oversized cargo pants over top.
Another tip...
If you can(many can't) skip the "longjohns" and wear the wool against your skin. The fibers "scratch" the skin,stimulating blood flow.
It's worked for me for many years!!!!!
(and I'm ALOT older than you are!!!)