In a nutshell...I hunted it when it was unit 121 right before becoming 53...I hunted in late november in the area that is now 53 though. Jim mountain and Dead Indian. . It was by no means an easy hunt. I would 100% not hunt that area without horses. The two main trailheads that access it are many miles from where the elk actually might be. And from what I was told by the game warden, they are even deeper in the unit earlier in the season. Back then there wasnt an October hunt, just 1 tag for both archery and november. Since turning it to 53, you will notice the draw odds for residents are almost 100% on the november tag because of how tough a hunt it can be. It might look like a small unit on google earth, but that country is vast and very big and rough. We were riding 2 hours in the dark every day just to get to where we would start glassing even further for elk. We covered over 20+miles a day horseback for a week straight before harvesting our bulls. I would think the October hunt would be a little easier than the November one, but i would not be camping in there without an electric fence. The grizzlies are rampant and known problems.
I would highly suggest talking to a few outfitters and the Mooncrest Ranch for a possible drop camp or trespass fee into the head of the unit especially if you do not have horses or arent comfortable renting them. Your llamas will only do so much before you physically are beat up in that country. Jim mountain Trailhead and Four bears (i think) are really your only options. Logan Mt, is completely private locked to get up onto legally. Rattlesnake Creek is entirely private to mooncrest ranch, which is why a phone call to them could be very beneficial to you. IF i was in your shoes, id either get a drop camp deep into the unit hopefully, or find a way to utilize horses.