Modern fantasy setting. All elves are werewolves, but not all werewolves are elves. The Great Courts left the mortal world, except the Winter Court who retreated to the most remote regions of the world, and the Autumn Court who wander the land like leaves in the wind.
The Autumn Court travel in great caravans, RV's and campers loaded with their worldly possessions.
Elves hardly ever speak with mortals, blatantly ignoring their presence unless they appear to pose a threat. Oftentimes when a human, dwarf, or what have you approaches an elf they are greeted with a blank stare.
For the most part the Autumn Court simply roams the land. Mortals can speak with them, however, if the proper offerings are made. Usually a freshly slain carcass is brought to the edge of the camp. If the gift is accepted, the mortal will find an elf at his home the next day and a deal can be struck. They always request strange, seemingly random things: at least three colors of broken glass glued to a walking stick, ashes from a bruned corn husk smeared over a local map, six pig's hooves and a shovel head, a goat's severed head with a rose crushed between its teeth, that sort of thing. Once a deal is struck, the elven family will fulfill their contract to the letter and spirit as best they can.
Stories circulate of what happens to those who renege on a deal with the Fair Ones. They rarely end well.