I did not feel the Saturday crush as much last time, because I was in the Hall
D23 panels all day, or in Hall E waiting for them. I may try this again this year. (Live Action & Parks). I get to see the floor and Archives exhibit usually on Sundays.
My opinion, you do not have to arrive overnight for Animation, that is a PM panel. Of course, some people line up that early for it, probably. I will scout the floor Friday AM for a few hours and then join the Animation line by noon. Again, just my opinion, and I will track the length of the line via Twitter, if it is filling up, I will head down to it. There should be a line for Legends, and for the floor on Friday morning, and possibly some for Animation. (I am ok sitting in the back)/
I doubt I will go in the stores this time, I really wasted too much time waiting for them at prior Expos. Maybe the Dream Store if there is no line.