A tip I try and let people know about is that if you are heading to the Marketplace side of DTD, you are better off (for now) parking in the Buena Vista Palace parking lot and just walking across the street to DTD.
It is free and it puts you in DTD right next to wear the WDW buses pick up & drop off. We always park there when going to that end of DTD and it is no where near the walk from the surface lot or garage at DTD.