The walk-ins areas (WIA) in Antelope Hunt Areas 109 and 15 are not real good antelope habitat; people do kill some antelope in those WIA, but in those Hunt Areas there is better antelope habitat on private land (very hard to get access to).
The land that the Hunter Management Area (HMA) is on in Hunt Area 10 recently exchanged hands so that HMA could go away.
I hunted 109 last year. Only saw 2 antelope on the WIA, one of which I shot. Overall, I am not impressed with the public land hunting in that unit. Good luck!