DreamVille Packages are only sold in combination with a Tomorrowland ticket.
The DreamVille Packages are available in the webshop during the various sales moments. If you want a Package with transport included, you can purchase a DreamVille package during the Global Journey Sale.
It is not possible to purchase an additional DreamVille Package or to upgrade a DreamVille Package afterwards.
More information on the ticket sales can be found here.