RE: Units 23,24 and33...........
If memory serves me right.....the Flat Tops correct? The last time I checked, unit 24 had huge harvest numbers, is a draw unit and is also in a CWD zone. I hunted units 25/26, east of 24 I believe which was over the counter. We were on a do it yourself archery hunt.
As gameforlunch mentioned altitude sickness, you might want to go to your doctor and request a prescription(forgot the name) for it. I did and never had any effects at all, and I scouted long and hard the day after we made camp. Good luck. I hope to return to Colorado on an archery hunt in '07.