Funny enough, BB King was one of the free shows I was treated to. It was incredible to see him, but strangely enough, it was his flute player that really impressed me most at the show (Which as a guitar player was needless to say, a surprise).
Columbia is a great town (easily the most interesting city in Missouri, for its size in my opinion). I graduated from MU with a B.A. in Chemistry, and a B.S. in Biochemistry, and now work there in the Environmental Health and Safety department (not to mention having met my wife there, and having married her on campus near Memorial Union). So anyway, you might say I have some fond associations with the school. Best of luck to you and your family.