I've been hunting that unit for over 20 years. The best advice I can give you is to get a current map or gps that shows public and private land. Make sure you know exactly where you are and where you are going. The badlands are not like the rest of the state as far as Section lines and fence posts on damn near every quarter. Most posted signs are not on fence posts out there especially once you get away from the roads. You can easily come up on private property and not be aware of it because there aren't fences around everyone's private land especially if you plan on doing a lot of walking or taking horses. We were greeted one year by a rancher sitting right in the middle of the road on a lawn chair with a gun across his lap. He asked us what we were doing. We told him, "driving to a certain area". He then said, "this is the last time you will be driving on this road". The problem with his plan to keep people off the road was it was a public road. We decided to not challenge him for two reasons. 1. There is plenty of public land access other than that area. 2. More importantly, if a guy is crazy enough to sit in a lawn chair all day with a rifle knowing damn well that he is confronting hunters who also have rifles, that's probably not a guy you should assume is thinking clearly.
Not trying to plant something negative in your head or anything, just trying to reiterate why you should know exactly where you are and where you are going with current information on public and private land. The only other advise I can give you is to bring a good pair of binoculars and use them a lot. Also, make sure before you shoot a deer that you can actually recover the deer because there are areas that horses cannot go and you may have to quarter and carry the deer out yourself. Sorry I can't be more specific on areas and other details but 1 of the guys in our group got a buck tag out there as well and I don't think it would be fair to him to tell you essentially where we will be going, otherwise I would give you specific spots to check since I won't be getting a tag anytime soon since I drew two years ago. Good luck and enjoy the scenery.