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Well I can only speak from my own experience:
On most Fridays and weekends the parks tend to be a little more crowded than during the rest of the week and on Sunday (This Week) DHS was Crazy! There were people everywhere, I had seen a wait line for the Backlot Tour for 30 min. and yes it was a SWW. Eventually the crowds disapated due to the rain but that didn't hold them a bay for long so I would say be prepared.