A few years back and it was like 80% or more LSU. Their fan base is crazy! The whole way into the stadium surrounded by purple and God they shouted "tiger bait" over and over, were chanting and singing the entire way to their seats.
But they were super nice and welcoming as well. One guy had a conversation with me while I was all decked out in Red (my in laws are from WI) and he asked me about being a WI fan. I told him I was actually a BYU fan but supporting the in laws. He wished us a good game then walked down to his seat chanting with the rest of them.
I'm going to the game this year and can't wait, it'll be a crazy fun atmosphere.