I have a goal of taking my kids to see all 50 states. We will be in a Sioux Falls in June on a trip from Mount Rushmore. We plan to go from Sioux Falls to Minneapolis. We will spend one night in Sioux Falls. I'm wondering if I can get to the corner of Iowa from Sioux Falls in a reasonable time. How far would it be? The rule is we need to step foot in the state, but having a meal there would be nice. What is closest city in Iowa to Sioux Falls and how long would it take to get there? Thanks in advance!!