I am so sorry that it has taken me so long to write back to you.Please accept my apology.
Well, I finally went out to Niwot Cemetery and took pictures of all of the headstones.Here's what I found on Baker:
After the Garvin family, there are six unmarked graves followed by: Charles C. Bakerb. Jan 1, 1861d. Apr 19, 1947 Elizabeth A. Bakerb. Oct 25, 1862d. Oct 16, 1929 (They share a headstone)
Then there are three more unmarked graves followed by: Floyd B. Bakerb. May 5, 1913d. Feb 2, 1921 Dewain M. Bakerb. July 9, 1922d. Jan 12, 1938 (They share a headstone which reads "Our Sons") William Baker1888 - 1961 Flora Baker1892-1976 (William and Flora share a headstone)
As you can see, there is not a headstone for William R. & Olivia Baker but that does not mean that they are not buried there.Perhaps they are one of the unmarked graves?Are any of these other people part of your Baker family?