Sorry to crash, but us ASTs had our convention at the Hilton in 2006. It was a blast! The hotel is gorgeous, the staff is wonderful and the food is delicious.
The hotel is right next to Downtown Disney, so it made for a couple fun nights. And they gave us almost a full day to do with what we wished, and it was awesome seeing sisters all over the Magic Kingdom!
Besides all of that, convention (no matter which sorority you're in) is an amazing and eye-opening experience. It's something you have to experience at least once in your life.
Go if you can! Have fun if you do