While in the area for my uncle's funeral, I was able to stop in at St. James Cemetery, St. Paul, Lee County, Iowa. I found my great-great-grandmother's grave!
It is understandable that it flew under the radar of non-genealogists in the family, if they were even interested in finding it! She was born as Maria Elizabeth Geers, later her married name was Maria Elizabeth Menke. After Johan Diederich Menke died, she married a Schutte. I was looking for Maria Schutte or Maria Elizabeth Schutte. She was buried as "Elizabeth Schutte". Regardless, I found her grave and got some good photos of it to add to my database. I also wandered through the cemetery for an hour taking photos of graves that had familiar names and took some photos to fulfill photo requests for fellow Find-A-Grave users. I ended up taking about 80 photos there. I'm still working on going through them, cropping them, putting them in my database and submitting to findagrave.com.
In the meantime, Rest In Peace, Uncle Urban. I'm sure you were greeted at the Pearly Gates with "Well done, my son."