Another thought. Hope this is allowed.
Does anyone remember a post of Tammy's shortly after Heather's disappearance that she was going to go to Carolina Forest to "visit a friend" and asked if anyone wanted to go. It sounded flip to me for some reason. At the time, I felt she couldn't contain herself and dropped a hint to where Heather ended up. Interesting that Longbeard's is in Carolina Forest... IMO. it may be nothing.
ETA: And this was waaay before we knew about Heather being at Longbeard's that fateful night.
I remember that too. I also thought at the time that she was taunting the Elvis family.