I'm a non-resident and no nothing about GMU34. However, I often hunt western states totally blind as you are about to do. There is a ton of information on the web if you look for it.
1. E scout - either onX or Go Hunt.
2. Watch the Colorado DOW videos on youtube about GMU34 - then email the warden that made the video and ask your questions - I have found most DOW wardens in CO will provide you with great insight for the areas that they patrol.
3. Get good glass & tripod - let the glass do the walking for the older hunter with limited mobility.
4. When you arrive visit national forest office, BLM office, DOW office closest to GMU 74 - ask questions and get maps - they are more than willing to point you in the right direction. Looks like there is an office in Glenwood Springs.
5. Bring tire chains