Are you planning on going thru? That'd be an incredibly late start. Are you very fast?
Expect extremely hot temps in places in New Mexico. 100+ degrees?
I'd ditch most of your backup cold weather gear. I'd ditch the down socks, overmitts, second buff, long john bottoms, windshirt (your rain jacket is pretty much a windshirt), ursack, bear rope, alarm clock, and can opener.
Most all of that could be added back when it actually gets cold. High altitude Colorado? Not 'til Montana?
I'd also consider starting two weeks later, southbound.
Have a GREAT trip!