There are two main options for parking: The parking garage over by Cirque du Soleil over on the West Side, or the parking lot near the Disney casting office across the street from Marketplace.
The roads around DTD continue to be really busy, even at off-peak times of day. So give yourself plenty of time to get there and get out of there. The parking garage is great, except for the location. I spend way more time in the Marketplace section, so I will be really happy when the garage over there is finished.