There’s a lot going on other than Lit Day. There’s going to be panels and Starkid performances and wrock concerts and muggle cast and maybe potter puppet pals. Lit Day is only a small part of it, you won’t be missing out just because you can’t participate in Lit Day.

If they do it the same as last year, the first day was a lot of crazy-ness of signing up and getting badges, so you probably won’t miss much if you show up at 11. The BIG events won’t be scheduled on the first day anyway, they’ll probably be fore the 2nd or 3rd day. 

The final day was a closing ceremony with sort of a brunch and goodbye performance by the more musical special guests. It’s really just calmed down, enjoying the final moments of the week and saying goodbye to everyone.