We hunted unit 7 a few years ago. We paid an access fee to hunt a ranch. Make sure if you are paying to hunt a ranch it's big. 10k plus acres. If it's not they leave the ranch when you shoot one and we spent several days seeing only does.
There are some walkin areas and some public land. Definitely get a gps chip with the land owner information. We found one nice goat but didn't shoot at him because we didn't know if it was private land, turns out it was public.