They haven't released Dec dates yet, I believe.
I saw the lights a couple of years ago, when it was in the backlot area, and it is truly a sight to behold! Be sure and snag a pair of the 3D glasses, if they offer them, creates a whole new sensation!
We had a blast strolling amongst the crowds, munching on cinnamon cashews, and enjoying the lights... there's no way we could have walked the whole thing in 5 min last time, due to crowds and distance, but I'm not sure how expansive it will be now that it's moved.
It's just a relaxing time to view Christmas lights, much like you would if walking through them back at home...