As a former oklahoman who transplanted last winter to colorado, I can relate to your dilemna. I hunted alot of the last 10 years in the SE part of the state myself. Things are done differently out here, so make sure you read the hunting guidelines carefully. IMO, oklahoma is a joke, in how they manage their deer, and after you understand how the western states, ok, well colorado does it, you'll see how. Im guessing you are planning a rifle hunt? Second and third seasons, end of Oct, early Nov, would be your best bet. First season is draw only, and fourth season is closed in some areas, and if winter moves in with a vengence, its tougher then heck. Colorado is all about the numbers and oportunity, most of the other western states are about the quality. There is still big ones here though, but theres plenty of other hunters after them too. Alot of the game units here,(aka zones in oklahoma) are over the counter, the rest are draw, and vary in how hard they are to get. Basically, you pick the unit and area you wish to hunt, and figure out which season you want. In the DOW book, there is a code assigned to each season, and game unit. Just have to pick the one you want, and buy your tag then. Need your proof of hunters ed. and ID. Some areas you can get cow tags as well. Its a huge state, compared to where you are now, and the amount of land you can hunt is mind boggling, coming from oklahoma,lol. Its far from flat of course, and the areas you will hunt will be 1-2 miles higher in elevation. Need to be in good shape to handle the altitude. Most areas, you need to expect weather and temps to be anywhere from 60* and sunny, to 10* and 2 feet of snow, with a nasty windchill. Drop me a PM when you get time, I can share some pics of the area, and can answer any direct questions you have.