There are some antelope in unit 70, I hunted it last year but it was a late season hunt and they were few and far between and very, very spooky. The walk in areas in the southern part of the unit weren't worth walking in to in my experience. Most of the BLM in the southern part of the unit is really rough country. If you are hunting public then I would stick to the BLM along CR 316 in the center of the unit or hike back in to the rough country off CR 319 just north of Ryan hill. If you can get access to the private land along the river that would be your best bet.
Hey Bigshot,
71 is a decent unit but public access is limited, if it rains you are pretty much shut down without the right equipment. The GPS chip is pretty much a requirement on this unit IMHO. I spent one full day and half of another one just orienting myself and marking my map on my hunt in 71. Don't be too quick on the trigger in 71. Private land access would be good in this unit too.
Bob