Magic, Mensa and Mayhem by Karina L. Fabian
It should have been a cushy job: Vern, the dragon detective, and his partner, the mage Sister Grace, are given an all-expense paid trip to Florida to chaperone a group of Magicals at a Mensa convention. Then the pixies start pranking, the Valkyrie starts vamping and a dwarf goes to Billy Beaver's Fantasyland hoping to be "discovered." Environmentalists protest Vern's "disrupting the ecosystem," while clueless tourists think he's animatronic. When the elves get high on artificial flavorings and declare war on Florida, it turns into the toughest case they aren't getting paid for.