Charleston is very open, too. Some of the top players practice in the stadium before it is in use for competition, and you can sit on the front row and watch them. You can also see them close up on the practice courts (last year, practice times were posted every day, but this year, you usually had to just check them out), and many of the earlier rounds are played on outer courts and player access is pretty easy after the matches. Of course, there are autograph sessions, too; I find those good for taking photos. And sometimes there are interviews with players.
This year, I took along photos I had taken of some of my favorite players last year, and had them signed. A couple of the players--Medina Garrigues and Stosur--really liked their photos and wanted to talk about them. Two other players who were especially nice to meet this year were Dechy and Castano.