RE: Let's cut the crap......I'm cold!
Double Creek,
You didn't mention if there was much wind. I find I can layer and be ok at 10 degrees or so most of the day. I carry those hamdwarmers and use them alot. However, if I get a little wind i get cold much faster. So I may only last half as long or even less even in warmer weather 20-30 degrees. If you can block the wind off you it helps a bunch. Wet weather gear usualy works pretty good for the outside.
JMHO
Good luck.
Jason