You can pick up your tickets up-to 3 days prior to Disney resort check-in. You can't do early ticket pickup at a resort, a ticket window or a water park. You must go to a Guest Relations facility. There is one outside the front gates of each theme park, one at the Epcot International Gateway entrance, one at the TTC, and 2 at DTD (
east side between Ghirardelli Ice Cream and Marketplace Co-op, and
west side at DisneyQuest). Due to DTD parking lot construction limitations, your quickest free parking choice might be to park at Saratoga Springs Resort (tell gate guard you're going to the food court or looking around the resort), then take the pedestrian bridge from SSR over to DTD east side.
Here's access to the latest map of DTD showing the new pedestrian bridge. Click on "DTD Map." You'll get the idea where to park at SSR.
http://www.themouseforless.com/tripplanning/dtd.shtml