There are few Elmore County Cemeteries that are on the Internet.
I'd contact the following organizations for more info.
Elmore County Historical Museum, Mountain Home, ID, 208-587-6847.
Glenns Ferry Historical Museum, Glenns Ferry, 208-366-2760.
Idaho Genealogical Society, 208-384-0542.
Mountain Home Public Library, 208-587-4716.
Family History Center, Mountain Home, 208-587-8391. Successful Searching!