http://www.sdgfp.info/Publications/Atlas/Index.htm
Here is the states game fish and parks website with maps and directions to public access.
There is very very little public access in Tripp County. I don't know if very many people or any people hunt them though. I've never seen anyone hunting them. Most of them are the areas around small lakes and have very good cover. I think they hold a lot of birds. Our farm is around the Hamill area in the north east part of the county. There are three small lakes within a few miles that have really good cover and the road hunting is great in the evenings. One of my buddies and I used to limit out every day after school was out for the day in highschool by road hunting. I blew my knee out in football so I couldn't walk fields. We would just drive around and blast birds we saw along side the road.
One word of advice, mark where your birds drop really really well before shooting another bird. One of my buddies from college dropped 5 birds in just a couple seconds but didn't mark where they dropped. I think we found one of them. Dogs are nice but is doesn't rain much and there are a lot of birds so there is scent every where. If it is dry and hasn't rained in a while, the birds will be stacked up where ever theycan find water.
If I wasn't so busy myself, I would take you out on some private land for no charge. I plan on doing a ton of deer hunting with my bow this year and won't be around much. I think I only hunted pheasant once last year and that was with a group of friends on one of those guys land. Didn't even hunt our land. If you decide to hunt Tripp county, let me know. I might be able to help you with any questions.