You could also valet park at the BoardWalk. On your way back from Epcot, there is so much to see and do along the BoardWalk. I love using the back entrance at World Showcase. Much less crazy than the front, especially after Illuminations. I know there is a self-parking area across the street from the BoardWalk, but not sure what the rules are. You could nicely ask the guard at the booth to the BoardWalk entrance.