This is way late to reply but I just read your inquiry. I think the cemetery is indeed called Pheba Cemetery, but I have no idea who manages it, and it's been years since I lived out that way, but I imagine the county supervisor has some idea about who manages it. Check with county clerk's office for a phone number.
the reason I read your message is that I saw where you had updated some census records on some Tindalls; do you have an interest in that family? I didn't find any Tindalls in your public trees.
Nancy Sparkman Brownlee