The wool socks comment is spot on. If the weather is going to be wet at all, wool pants too. Don't wear jeans in Colorado at elevation in late October. I'm always amazed at how many guys I see wearing jeans while hunting. Fine when the weather is good, but cotton does not keep you warm when it's wet like wool does. While I'm on the topic of clothes, you'll want layers. The early mornings can be very cold, but by 10 am it could be shirtsleeve weather, so you'll want to shed and add layers as needed. I usually carry a daypack that is mostly empty (it has water, sock hat, first aid kit, snacks, spare gloves) but I leave room to stick in clothes as the day warms up.
You have information overload yet, Chris? 😂 Be in shape, bring good gear and enjoy the experience. I'm still learning too, I haven't killed an elk yet myself, but it's fun trying.