The group that I hunt with for archery elk spent a lot of years in the clearwater and matheny. We did very well by averaging over 2 a year for 4 hunters. We went through very dramatic decline in overhaul numbers to many rumors and some first hand information of vast numbers of native hunting.
We quite hunting out there when it went to 3 point only, so that is quite a few years ago. Another factor that was showing its results was the lack of logging due to endanger species, no new cuts and everything growing up.
I do know that there are still good elk being taken out there in archery seasons. Yes there are a lot of gates and if you spend your time behind them you will increase your chances and also get away from the native hunting. Some of the gates are open at certain times for fire wooding.
Good luck.