I spent some time looking over units 69 and 72 back in October. I saw a bunch of animals in 69 but I don't think I saw a buck over 11 or 12 inches. The bucks were fewer and farther apart in 72 but a little better quality. Unit 69 has much better access than 72 but 72 has enough if you are careful where you are, some of it is a little chopped up. I did hear that the tag quota was going to be cut in 72 (good idea IMHO) just from the terrain and the deer I observed I would say that 72 would be the best unit for what you are looking to do. If you go early season be aware that the Rattlesnake hills are aptly named! I hunted unit 70 this year for pronghorns on a leftover tag, it was a tough late season hunt and I took a first timer with me that seemed intent on spooking every buck in the country. I was not even able to fill one of the three doe tags I had in my pocket, let alone a buck tag
Hope this helps!