My Family Roots Run Deep .... Visiting My Ancestors One Cemetery to the Next part 2

Part one of my search for ancestors cemetery to cemetery was visiting Adam and Rachel ( Millsap ) Zion.
Next stop Sterling , Logan Colorado . Total Travel Estimate: 5 hours 28 minutes / 321.87 miles timed by http://www.mapquest.com/ http://www.mapquest.com/maps? This is where my great aunt Mary Etta Zion Exley died. She is a sister of my grandpa Perry and one of my dad's aunts.
As of now I am at a DEAD END. I have not been able to find her grave in Logan Colorado. Searched for her husband Orville Exley who died in 1938 in Sargent, Nebraska. As of now I have not been able to find his grave. I was hoping that she would be buried next to him. So for the moment I am at a dead end and need to make a U turn on the road to find the next cemetery. Will be spending more time on this search and put out emails to cousins to see if I can find more information on them.
Until then we will continue are search for another family member and another cemetery.