I flew food relief into southern Sudan during the late 80's and early 90's. There was one hell of a shooting war going on there there and I recall a Sudanese general I gave a ride to from Nairobi tell me that mines were a real problem there.
Recently, a friend of mine was involved in road building near the old unfinished Nile bypass canal. There was some bandit problems in the area and they were equipped with "technicals", Toyota pickups mounting Soviet 12.7's, to keep them at bay.
The war resulted in great depredations among both game animals and the local residents. Starvation was rampant.
I heard that Juba is now quite livable.
My only concern would be uncleared minefields, but I assume an operator would keep you clear of those hazards. Mining wasn't as bad as in Angola, but I would imagine there are still plenty laying around.
I'd try Uganda or other better known areas.
