Grumble grumble... silly DnD and changing them into outsiders every book I have read that doesn't fall within DnD/Pathfinder specifies them as a type a faerie and thus fae/fey but tricks shall be had! So our characters need to discuss creating an undead horde then making them look like clowns it would be a marvelous prank considering children will think it is a carnival XD
A Carnival with a ferris wheel, a donkey ride, some candy floss. Man, it'd be awesome. Leave it set up a few days, let people grow to like it and love it, then lock them in there.