I volunteer at Shiloh Museum in Springdale, AR and know where Mt. Comfort Cemetery is, but have little time to search for other folks, however Susan Young, Outreach Coordinator at the museum, has cemetery lists and photos of tombstones. Google the museum for her e-mail. Another source is the Fayetteville Public Library which has cemeteries lists for the entire area and many volunteers in the genealogical department who might be able to find what you need.
If none of this works for you, e-mail me what you know and I'll try to drive out there--it's maybe 10 miles from me--on a nice day and look them up.