TX gave you good starting points.

Spend the $100 and buy the CO big game disks. You can get all the harvest data back more than a decade. You can decide on what you are looking for, and get reports on hunter success, # of licenses, points required to draw, undersubscribed units etc. After you decide on the right unit for your goals, then you can download maps to 1:25,000 and find very specific areas to consider. After a few weeks of that, then you can call game wardens. Then you can scout for yourself. Most people won' t go to half that trouble, which is why Colorado' s herd of 330,000 elk is safe and continues to grow, despite the state issuing 146,000 draw tags this year.