http://www.iridetrol.../marker-map.pdf
http://www.thedibb.co.uk/
might be useful
first time i went back in 2007, used google maps months before hand to know the rough idea where things were - https://www.google.com/maps/place/Orlando,+FL/@28.4452175,-81.4758014,15z/data=!4m2!3m1!1s0x88e773d8fecdbc77:0xac3b2063ca5bf9e