We agree about how strange it felt having such a late sunrise for most of the cruise.
They set the queue up differently for the Halloween group photo line so it wove around more towards the beginning of the line, to try to keep it out of the hallway more. Can't remember which day it was, but one day there were 3 different lines snaking around back by the shops (for group photo, charms, and lithograph signing) & people were accidently in the wrong lines (and very unhappy when they found out). If in doubt, we always asked what the line was for before joining, and were surprised by how many times we were told by a last person in line that they didn't know what the line was for.
We did do the trick or treating, just to see what it was like, and ended up with SO much candy, so we walked around & gave it out to CMs all over the ship - we had a lot of fun doing that.