Don't you listen to the Xojo podcast?
Well, if you missed the announcement. The conference next year is in Houston, Texas in the Boutique Hotel Derek from 5th to 7th October 2016.
This is outside the center of Houston on the west side on the inner highway ring. Close to the Galleria shopping mall.
Last year I visited Houston including the Battleship Texas and the Houston Space Center. Be sure to go there, too!