Gonna give you more than you asked for, sorry.....

It don't matter what the weather there is now (moderate).

At the time you will be there it could be beautiful fall days with crisp mornings and warm noon hours (fair %)to black skies with thunderstorms and hail (happens) to blizzard conditions (though in late October probably won't last long).

One constant, if you don't like the weather, then just wait 5 minutes; it will change.
================

So you gotta be prepared for them all.

If you are doing a DIY, then camp has to be able to keep you warm and recharge your battery. Make sure you can get your camp and vehiclesout in case of an extended snow. Make sure you have some serious "meat cutting capability" and some serious "meat hauling capability" in case you kill something (especially elk). IMHO, if time is limited it is better to sacrifice a couple days off of the end of the season and apply it to the front end for scouting and acclimation than it is to arrive the day before the hunt. To be most effective in terms of hunting, be sure to have the capability to navigate fearlessly in the dark. Please do not take ATV's or trucks beyond where it is legal.

We'll be leaving just as you are arriving. I'll be sure to cast a glance over your way across the valleyfrom our Elkhead Mountain Range(at a mere 8,000 to 10,000 feet)

Good Luck.