Erwin and Sherry, the rest of the family at BA are the best. I've known them for decades, several trail rides with the family over the years, used to run into Erwin on the Madison once in a while as well. 2 years ago solo DIY'd out of their lodge for elk. They have long time clients coming back year after year, and while I didn't connect that week, I slept warm and dry and got good info on where to go hunt on their side of the Gravelly/Greenhorns, my cabin is just over the hump on the E slope.
We focus further E and/or a little N from our side of the range, but I know 324 a little and the guys there the week I hunted got into a few. However, they stated that archers, early Sept anyway, have about a 50% harvest average. It was hot, and they also saw a lot more archers than some years that fall ('17).
Clarks will give you good info if you self guide out of the lodge and feed you well. Probably about the cheapest high odds light support setup you would find. I have not done a guided trip but it would be top notch, I've seen how they operate and I guide a bit myself.
Late season/rifle is really weather dependent, of course, and I mainly do archery, though we got a couple elsewhere SE of them last fall rifle - but it was like Sept. conditions.
I don't worry about wolves on me, they obviously are going to cull elk, but grizzlies and black bears are thick and bold. Spray and firearms at the ready, it's pretty western around there, further S down the Ruby you go, the more bears. Safety factor goes up exponentially when guided.
Of the 3 bear incidents in '17 at their lodge and out of their spike the first archery week, (3 incidents, about 60 'hunter/days' while I was there in this first week of archery) Chris Clark, their (adult son) guide at the spike, notched his archery tag on an aggressive black bear that came in and kept circling their group at a fresh elk kill. They also chased a griz off a kill (contrary to conventional wisdom - Cowboy up!) they had left to get horses - and it had already had a snack. Yeehaw.
Out of the lodge, in 45 of those 'hunter/days' (9 guys x 5 days), one archer in a slough area backed away from a griz at around 60 yds. that did not bounce at the guy's coughs. So; bears are there, and they figure they should be. Keep your nose in the wind.