I'm going to jump in here to try to help with Colorado hunts that you may be planning. I've been hunting elk, deer, antelope and every other species open to hunt in this state since I was ten years old. I did two elk hunts last year, one in Colorado and one in New Mexico. I live about 140 miles from Chama, NM and the Jicarilla, in the Southwest part of Colorado.
Elk hunting is hard on public lands. Don't let that discourage you. If it's any consolation it isn't nearly as hard as sheep or mountain goat hunting!
And you will see incredible country.
Elk are where people are not, so public land hunting with a high level of hunter pressure moves any elk around to the most difficult terrain and heavy cover. Outfitters and private ranches charge very high prices, because when the pressure is on elk move into areas on private land where they are not bothered, and more easily hunted.
Elk are also influenced by the weather, and the last several years it has been warm and dry through the first Colorado elk seasons. This keeps the elk at very high altitudes until the snows drive them down. Not to say that you won't find herds at lower altitudes, but it is more challenging.
Weather is one of the biggest factors and risks to hunters in Colorado. It can be 65 degrees one day, and you have two feet of snow over the next 48 hours.
Colorado Parks and Wildlife publishes harvest statistics for all the GMU's and you will see that overall success rates average 15 to 24 percent for most game units, so yes you will work for an elk.
If you want to ask me questions, fire away. I'll check in every couple of days and try and answer any.