I don't believe there is a direct bus from DTD to Blizzard Beach,which is adjacent to Winter-Summerland.I think you will have to take a bus from DTD to a resort and then transfer to a BB bus.The closest resorts to DTD are Ole Key West and Sarotoga Springs with Port Orleans a little further away.You could also take a boat to any of these resorts.If time is an issue,a taxi may be your best choice.