I remember hearing about a tunnel that ran all the way from the downtown area to campus. Supposedly Huey used it. Heard it might have been from the Downtown Hilton area.
There may be some truth to that. A buddy of mine was working as lobbyist at the capitol during session one year. He became friends with one of the reps. I don't recall what parish he was representing. Anyhow, his buddy took him down to stacks/library in the basement. In there was a door that opened to a tunnel that led to the Hilton. My buddy walked around for a bit down there and took a few pictures. It didn't look any different from the tunnels I had been in back in my hay day at LSU.
I guess what one could take away from the story is that it's not entirely farfetched to believe there might be a tunnel leading to campus from the capitol area. I personally don't believe it but the inside of both tunnels did look about the same, but then again they were probably both built at the same time and by the same builder.