Our Laura Ingalls Wilder Vacation

So our plan is to go to many of Laura Ingalls Wilder homesites and also just visit a few interesting places that we will pass along the way. We plan on going to Kansas, which is where the "prarie" was. Then to Mansfield, Missouri. Burr Oak, Iowa, Pepin, Wisconsin, Minnesota, and De Smet, South Dekota. We really don't know if we will be gone 20 days or just 3 due to the kids not being able to handle the long road trip or someone getting car sick.