If you drive to SD and don't get a shot at a bird all day long you either didn't work very hard or were not paying attention. I can just drive around and have an opportunity at a limit if I put some work in. Phil81, go and enjoy yourself, SD is a beautiful state I have probably made the drive 50+ times in 25yrs. I have seen years when you had to try and not shoot a limit in the first 10 minutes, and other yrs that it took all day. Get up early and spend 2-3 hrs scouting. Once you find the birds plot them out and hunt. Weekdays are better obviously, find dirty ditches next to cut feed and you will find birds. Don't be afraid to move to a different area. Don't let the negativity of some keep you from an adventure. I spent a day last fall not shooting my gun. I watched my dog flush a ton of hens, saw some antelope and mule dear, ate a big steak and had a great day. The next day I shot a limit in about a minute in a half ( with an over under mind you). Be safe and have funit's sure not all about shooting a limit everyday, no doubt about that......but when i drive that far and never get a shot all day long? And it is tough on a young dog when trying to get some reps and real bird contact as well.
i am not trying to discourage you, check the fall forecast when the numbers are released, (there may be some bright spots), but from what i saw/know this will likely be a dismal season. good luck and let us know how it goes.