I have a feeling Rimrock got hammered by deep snow this year. They don't have many deer in that area to begin with but do have some whoppers if you can find them. It may be a frustrating hunt with the nonrut dates they give you?
I don't know much about Snake but the public land in that part of Colo gets hammered by hunters; however, there is private that may not get hunted as hard? There is pretty high density of deer in those units and once in a while you hear about a whopper shot on private land. You'll be competing with the doe/bull/cow hunters because their hunt dates are the same on that particular ranch.
