In the Little House books, Laura Ingalls Wilder wrote about living in Wisconsin, Indian Territory (which became Kansas), Minnesota (though never named), and Dakota Territory (which became South Dakota). However, Laura Ingalls Wilder died and was buried in an entirely different state. 

Almanzo and Laura Ingalls Wilder eventually settled down in Mansfield, Missouri. Almanzo died in 1949. Laura died on February 10, 1957. Laura and Almanzo are buried in the public cemetery in Mansfield, Missouri. They share a headstone. 

Please note: Based on my research, I do not think the birth year on the headstone is accurate for Almanzo Wilder. I've talked to multiple Wilder experts who agree with me.

Laura and Almanzo's daughter, Rose Wilder Lane, is buried next to them.

The houses have guided tours, and the museum is small and self-guided. You'll only need about four hours to do it all. (And if possible, walk to the Rock House!) With extra time you have, you'll want to visit the library, the Square downtown, and the Mansfield Cemetery.

Once at the Mansfield Cemetery, look for the green "Wilder Graves" sign (as seen above) to point you in the general direction. A fence distinguishes these graves.