I believe Wes is right on. No expert by any stretch of the imagination but I've hunted the late archery, late rifle and 1st rifle. Late archery there was snow on the mountain and the deer were either low, or migrating (and rutting). I brought a horse but he stayed picketed the first week. I went home for Thanksgiving and he didn't come back with me.
Late rifle ended 11/11 the year I had it (it's earlier now). I hunted late. There was lots of snow on top, I was 10 years younger and didn't need horses on that hunt either.
I hunted the 1st season the year after the late archery hunt, about 2006. We used horses and camped about 12 miles in. We got 22" of snow on 10/02 that year. Great hunt, tons of bucks. We actually led 3 horses in with our gear and feed but the walk was easy not carrying anything. We shot decent bucks BUT I felt we were "optically challenged." My cheap spotting scope was frustrating, mid-level binos were sub-standard. I got home and ordered some 15X56 Swaros and a decent spotter. I planned on going back since it was so much fun. Next thing you now you have 3-4 PPs and Unit 10 isn't on your radar. After I burn my PPs, Unit 10 will be on my app for at least the next 3 years.
So IMO Wes is right on, horses and optics.