South Dakota Department of Tourism
711 East Wells Avenue
Pierre, SD 57501-3369

Information Centers in South Dakota offers a wealth of information for visitors. You can get brochures, travel tapes (to combat boredom on the long car rides), get info on weather and road conditions, and talk to knowledgeable travel counselors about the various attractions and sights. Many of the information desks are closed in the winter (the desks specifically along I-90 and I-29, that is), however.