Every October elk hunt, I wear blue jeans with a pair of long-johns underneath if it is cold; no long-johns if it ain't. I have a pair of well insulated camo pants that I bought from Cabela's, but I only wore those once during a heavy snow one October. But hiking through the backcountry, I was burning up something fierce, so I haven't worn them since. I also have a pair of waterproof 'rain pants' that are camo with a lot of elastic so that you can pull them over whatever pants you're already wearing. I've never found the need to put them on yet. I used to pack one or both of those camos in with me, just in case, but I stopped doing that. They stay in the truck at the trailhead now.
I've found that a comfortable pair of hiking "boots" or tennis shoes, a pair or two of plain socks, blue jeans & long-johns, a long sleeve T-shirt and a flannel shirt are all I really ever prefer 99% of the time. I'll have a few more layers back at the tent if the weather really changes, but I like it cold if I'm going to be hoofing it up and down the mountainsides. I really like to start out the day 'under dressed' if it is going to get up above 60°F. I'll work my way through the morning cold and I'll be nice and comfortable when the sun heats things up. I hunt with guys who dress for the sub-20°F mornings and they have to then shed all their shed layers and carry around those extra clothes in the warm hours. I've been there, done that, and it blows. I'd much rather be a little cold, for a short time in the morning. In the blackpowder season, I wear a short-sleeve T-shirt and shorts. I carry a pair of cotton 'garden gloves' and a toboggan so that my ears and fingers don't snap off during that morning freeze.