Great guess! How should I put this. Well, you didn't quite have the right answer to the question, but the fact you gave at the end was indeed correct. The Disney ride "Splash Mountain" is indeed based off Disney's first live action film called "Song of the South," although the whole movie was not released in the U.S.A. because the Disney company decided that it could be considered racist. Although the movie did have live characters, it had animated ones as well, the characters Br'er Fox and Br'er Rabbit, as were also the theme characters to see during the "Splash Mountain" ride. "Br'er" is actually a real abbreviation for "brother." It makes it easier than saying things like Brother Fox, although my old studies say that this shortened expression has a prior-to-a-name usage only, meaning that the word is grammarically incorrect standing in a sentence otherwise. You couldn't say, "Hey mother, I'm going to check on my little br'er," and be considered using it the right way too. The smaller version of this word may be limited in options for placement and is used very rarely these days, but that makes it all the more interesting to hear or read it, no? I'm sorry, it's just that when I was a teenager, I wanted to be an English teacher very badly before I wanted to become a writer, and I guess my old spark hasn't been completely exstinguished yet.
As for more hints, the ride is only in Disney World, and has never been in Disney Land. An attendant was crushed during the ride as it was moving when it was in the non Disney amusement park, which is why it was stopped being used there and Disney got it for their use and changed it quite a bit. The ride offers more knowledge of American history than actual "thrills" like "Star Trek" "Thunder and Space Mountain" or any other fast ride. This narrows it down, but since this fact is so trivial and thus very unknown, I may have to say more, but I won't mind at all if I have to. Later!