South Dakota Rest AreasIn response to my inquiry, Mark King of SD DOT replied on 2/9/2009, “We do not allow overnight stays in our interstate rest areas. State law limits stays at rest areas to 3 hours unless you are a trucker covered by Federal guidelines. That isn’t strongly State: South Dakota City: All Nearest Town: All Status; Unofficial boondocking Cost: Free Nearest Road: Paved Scenery Rating: Months Opened: Year Round Extras: None Number of Camp Sites: Unknown Max Stay : -