I'd guess Doc or Fifi would be in the top 10 now. Fifi I think was still down for engine repairs in 2011 and now Doc been up for three years with shots from everybody that goes to Oshkosh
Top airports
I would be Oshkosh is up there, maybe KLAL for Sun N Fun, KLAX, KMIA, LHR, FRA, MAN, AMS