i was there last year and it was one of my best days ever!!
crowds where pretty heavy but i didnt know it was a SWW until i saw leaflets in the resort lobby so i go and everyones dressed up like SW characters and all little kids who are dressed up do jedi training -seeing them in all there outfits was cute!
crowds pretty busy from great movie ride all the way through to LMX, if you do go that way be prepared for "if one moves then we can move" rule. they had special editions of WWTBAM star wars special at certain times throughout the day, character meet and greets. i swear to god the CM who was signing autographs who was suppose to be hayden christiensen looked the spitting image of him - i couldnt get over it!!
its such a fun experience and if you get the special SWW maps they turn into a lightsabre - different maps=different colours.
it was empty by RNRC and ToT.