If I remember correctly, "MoMo" (which is short for "Missouri Monster") wasn't seen until the early 1970s, and then in NE Missouri, near Louisiana. It's a similar story to the (in)famous (cue
The Three Amigos) Legend of Boggy Creek in Arkansas, which also originated in the late 1960s. Vance Randolph, the noted Ozarks folklorist, makes no mention of "Bigfoots" in his magnum opus, although he does discuss the sighting of the "White River Monster" in the early 20th century.
A ride like "The Haunted Mansion", featuring ghost stories from Randolph might be fun. Another thing I would like to see is a return to the Yocum Silver Dollar story -- A "Breadtray Mountain" themed ride or attraction that tells the story of the Yocums.
Apologies for being pedantic there.
T.