We had a fab time, thanks so much to everyone who gave me advice!
We bought FOTL tickets, which literally did put us at the front of the line for most houses, didn't seem many people using them, and so we ended up being front of the conga line going into the majority of houses too. So worth not having to queue, some of the normal queue times got pretty hefty.
Loved the pumpkin spice smell in Halloween and gingerbread in Krampus - great theming! The smell in Texas Chainsaw and The Exorcist, not so much, haha! Also really enjoyed Freddy v Jason. Had a fab time at the whole event!