I saw some guy propose in the little gazebo-thing on the path from the Boardwalk to Epcot. From what I saw, they were just being all cuddly, watching the boats go by in the lagoon when he bent down to "tie his shoe." Needless to say, his shoes were tied. "Will you marry me?", "OHMYGODAHHOHMYGODOHMYGODYES!", etc.
That's just from voyeurism, though. Congratulations to you, assuming you're the one proposing! It's going to be amazing no matter what!:sohappy: