Does the funeral home still exist? If so, you might contact them and see what they can tell you about whether it was renamed, misidentified, or if it was in another location. If anyone will know, they would.

Also, was there someplace else where the family was concentrated? Check there for a Mt. Grove Cemetery as well. My GGgrandfather was transported from Wyoming to South Dakota to be buried, and they were of modest means too.

~Jenny