Servicing Customers In Halloween Costums?

This is my first year in business. I'm thinking of wearing a Halloween costume as I drive to customers locations to service them. Imagine a grim reaper coming to your front door to repair your locks or install a new lock. I think it would be fun, but what would the customer think? People can be so uptight these days and I would still like to manage a good image for my business. Is it inappropriate to service customers in a costume? Would the consumer be offended by the professionalism of a Locksmith wearing such a thing? I'm a pretty big guy so I'm sure some customers would appreciate the Leonidas outfit, but then again I still could lose the professionalism points. What do you think?