Here is a link to the CDOW website and its GMUnit maps page. Very useful information in case you haven't researched it yet. Also, use Google Earth! It is a tremendous resource in getting a 3D view of the areas you want to investigate further. Get a good GPS unit and mark the coordinates of the areas you want to hunt.
I hunt GMU 43 for elk and I cannot stress to you enough of the importance of getting into tremendous shape, especially if you are from the flatlands. This unit is extremely steep! It is a wilderness area which in Colorado means foot traffic only or horseback. No wheeled vehicles or carts. Be prepared to backpack the meat out or hire an outfitter with horses. Good luck on your hunt!






http://wildlife.state.co.us/Hunting/GMUnitMaps.htm