Living in Craig for years, I can tell you that there are some resident deer, but most of the deer migratory. In fact they tend to migrate the most on the last full moon of October. There are always a few deer in the sage in 3/301, but there are always more later into the year. they will typically migrate from east to west pretty straight line. Again there are some resident deer, but there are tons that migrate in...
The deer population sucks. The quality of bucks sucks. In all honesty you would be hard pressed to fond any areas in NW Colorado that have seen any recovery from the 07/08 winter. Think of it this way... Deer died off big time in 08. Then in the fall of 08 they did not drop tags at all. Thus the ones that lived got hit hard during the seasons (this was the last year I had a Colorado Deer tag, and it sucked). So in spring of 09 you get your first crop of fawns, unfortunately the Coyotes were still strong and the rabbits died off at the sametime. So that years fawn crop got hit harder than usual. So fall 09 fewer tags but a lot fewer deer.... This was compounded by bad winter kill, over harvest and higher than normal predation. Thus 2010 was the first year the deer had any chance to recover. It has only been a couple years since then....
The herds are nothing like they were prior to 2007 (which was OK but not great).
That being said, get out and hunt. There are good deer in every unit and always some nice bucks taken in 3/301. The way the fall is going expect the 2nd season to be wet cold and muddy...
Good luck!