Ok to make this work it's a bit AU and Dawn is a WHOLE lot younger in this challenge then she was on the show.

The idea is that it's Halloween night! Buffy is out partying at the Bronze with all of her friends. All the normal vampires and demons are all at home totally disgusted with the holiday. All of them except Spike who swings by the Summers house. There he finds an upset pouting Dawn in some type of trick or treat costume and Joyce who is running around the house.

Turns out Joyce was about to take Dawn trick or treating but an emergency came up suddenly......a water pipe busted at the gallery....a once in a lifetime sale at the gallery....whatever it is Joyce has to get to the problem....and there's no to take young Dawn out for candy gathering!

Until Joyce ask Spike if he could take her and Dawn turns pleading big blue eyes at him! Spike is so disgusted with himself but of course he can't say no.

So Spike finds himself holding the hand of a little girl as she runs up to door after door ringing bells and getting candy!

Some way some how they run into Buffy who is in shock Spike has her sister out trick or treating!

Ideas I had.....

Spike telling Dawn spooky stories as they trick or treat....but instead of being scared young Dawn wants to hear more!!!

Spike stealing candy when no one is looking!

Someone asking Spike if he's dressed up as Billy Idol! Spike is not happy!

When they run into the Scooby Gang Xander is at first mad.....but when Spike reaches into his duster pocket and hands him a large candy bar Xander shuts up.

Maybe there's a group of kids tagging along together? One of the moms is very hot and dressed up in some sexy slinky costume. She flirts with Spike all night. So when she comes on to him again when Buffy's there Buffy is NOT happy.