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. If not, you can purchase tickets during the other sale moments in February.
It is not possible to purchase an additional DreamVille Package or to upgrade a DreamVille Package afterwards.