Prepare the crust by combining the cookie crumbs and margarine. Press into a 9 inch pie plate and bake at 350 degrees F (175 degrees C) for 10 minutes.
Prepare the filling in a microwave safe bowl by combining the marshmallows, milk and pumpkin. Cook on medium heat and stir until all marshmallows are melted and mixture is smooth.
Beat in cream cheese, cinnamon, ginger, cloves, salt and vanilla; fold in 1/2 container whipped topping.
Melt caramel in microwave and drizzle 2 tablespoons over crust. Pour filling into crust and top with remaining whipped topping, pecans and any remaining cookie crumbs. Drizzle remaining caramel over top. Refrigerate for 8 hours or until chilled.