The whole central portion of 231 is routt national forest, so land access shouldn't be an issue. If your hunting late in the season, i'd stay lower in elevation, 10k ft at ripple creek is most likely too high for the elk later in the season, especially if it has snowed.
good luck, routt and white river are nice areas, some areas (like trappers lake) south out of 231 have been hit hard by fires in recents years.
I hunt 231 every year actually. Mostly for elk. Last year I got a big 6x6 bull. Just got back from up there yesterday. Got another good size bull but it is just a 5x5. Not bad though because I'm in it for the meat mostly. As far as deer go, I have seen some monster bucks up there. Just not a real fan of the taste of deer from the hills compared to deer from the plains out in the eastern Co plains.
Bring them in on a string. I love this term, if you want to be successful on calling in Elk, try not to just sound like the other caller. We all laugh at each other when we are practicing Elk calling at home or while camping. When I first started calling in Elk, I had no idea what i was doing and it's funny how many I could call in. The biggest Bull that I have called in to date was actually my first. I was making cow calls and screwing it up big time. But it's obvious I didn't screw up...