Mid-May of this year is the only time I have been to the Pine Ridge area. Although we (two of us) only hunted a couple of days, here are my thoughts/observations, as well as what we were told by other locals there:
1) The turkey population has apparently decreased significantly,...at least on the public areas.
2) From what we saw, there is a big difference in the number of birds on private relative to the public. We saw quite a number of turkeys on private ground that acted like they had never been hunted,...gobblers would stand next to the road unconcerned by our presence in the truck,...and this happened numerous times in different places.
3) Even late in the season, there was still significant pressure on the public areas, and the behavior of the birds clearly indicated they had been hammered pretty hard.
4) Lots of that country has been burned in recent years.
5) The country is a lot more rugged than what one might think and vehicular access is limited. Be in shape to hunt it and expect to have to cover some country to get to areas that have had less hunting pressure.
5) If hunting public and you don't have "insider info", allow yourself plenty of time to look over the country and explore all the possibilities of where to hunt. Without knowing where to start, it could take several days of hunting/scouting just to figure out where to focus your efforts.