Nothing says Halloween quite like trick or treating, and in that spirit you’ll be asked to play tricks on a number of Middle Earth’s residents. Each festival area has an NPC who will ask you to find four people and perform emotes on them. You aren’t told the precise emote you need to use, as instead you’ll need to puzzle it out based on the dialogue you’re given by each person. It’s a more rewarding experience if you figure it out on your own, but if you’re stuck here are the precise answers.
In Bree, start by talking to the Human NPC just north of the Town Crier. Keep in mind that these quests are timed, but it’s a pretty generous limit so long as you don’t mess about too much. From the quest giver, head south to the town hall. Use /dustoff on Tad Ashmead, who is standing just outside of the building. Then head to the Bree hunting lodge and use /shiver on Tad Leafcutter. Next, head to the Vault but take the left turn before you reach it and you’ll run into Mat Heathertoes. Use /mock on him. Finally, find Lily Sandheaver by the West Bree stable. Use /yawn on her, then return to the initial NPC and collect your reward of either three fall festival tokens, or a special mask token. More on those later.

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In Thorin’s hall, start with the Dwarf NPC in the far right corner of the first room. Head next door to the Auction Hall and /charge any of the Auctioneers. Next, go to the crafting hall and /flex at Egil Oldbeard. Then go show Adwyn Flame-Eye your /pushups over by the Hunter Trainer. Last, head up to Dwalin’s thrown and throw a /tantrum at him, then go collect your reward.