Have a good time, dude! If you're forced to do the Disney World thing, then make sure that you at least get to see Epcot Center. It's fairly interesting. Other than that, get yourself a tan and get back safe.
Have a good time for sure. I would recommend checking out the NASA facilities that are open to the public. I found that the most interesting.
I havent been there since 1990, so I am not up to date on most things, I did Disneyworld. I mostly remember old folks and everyone we went people giving us wierd looks because we had Alaska license plates.