I did MK extra hours on Sunday as well (I got back thursday as well!). By the time we left (around 1:30am), we were just about the only ones in the park. We did AK and MGM on Monday, then EPCOT and MK(for dinner) on Tuesday, then MGM/MK/EPCOT on Wednesday. We didn't have any line problems, probably the longest wait was 20 min or so for Peter Pan. MGM proved to be empty on Wednesday morning as we rode Aerosmith 3x, and then TOT 2x (back to back in fact). All of the signs outside of the rides were wrong, and we hardly EVER needed to use our fast passes, I LOVE THE FIRST WEEK OF MARCH!!!