the region c powder river area i have never hunted, but driving to the mountains to hunt i have nearly hit enough big muleys there to know it cant be all bad!!

that blm outsida osage and upton can be good, but you will see hunters.
the moskee area, theres lots of public land there, and lots of deer, but remember lots of whitetails too. basically, there a lot of deer everywhere in this area, but the main thing to remember is big muleys are where ya find em.

get landowner maps for weston and crook counties (newcastle and sundance) and look em over hard. lots and lots of smaller public spots, often times just a section or 2 that are somewhat overlooked, and just might hold that muley your after.

i grew up in osage, and i can assure you that there are plenty of muleys in the whole osage/upton/sundance "triangle", the trick is just finding em. again, call a couple landowners too, ya might get lucky.