For the Last Time: The Original (and best) Title is FOLKS AT RED WOLF INN
How do so many sources keep getting this wrong?
(1972) (theatrical) Folks at Red Wolf Inn - rated ( R )
(1976) (theatrical re-release) Terror House - rated (PG) (edited)
The film had other titles on video, but was never released theatrically as Terror at Red Wolf Inn.
The original trailer with the correct title and R-rating can be found on YouTube.