ive heard that both will be packed. here are my tips
1- make sure to use the three hours early to get on some the most famous rides at the party (hm and space) seem to be long lines at party's so im ready to tell son we aren't going on it at party (before or after sure)
2 make a list of the charters you really want to see. Skip some of the trick and treat stations and make sure to get in line for the most famous or busy chr lines (for us we are spending alot time near small world to make sure we see as many villens as we can and prayign to catch our fav (melifcient) lol
3 if you want to see some of the shows (ie at tl mike and sully, or near hm the jack and sally ones) make sure to plan it.
4 make sure to get good seats for the parade or fireworks just like you should for normal days. a bit early.
(Im gona try get on the wall near small world to sit there or where we sat for the magic memory and you show (up near the brave meet and greet with tables) two good places and up so those in front of you wont block your view.
5 over all have fun dont get to stressed. Plan but also plan on if plans change we do this instead.