Hadn't even thought about bear spray, and I heard it can really be effective.
OK here's the thing about bear spray. It is basically pepper spray and when it is shot right in the bears face at close it will discourage them. However, if your can of bear spray has a slight leak or you haven't cleaned it up after using it and the bears catch the scent of it; well it seems to work like catnip and you become a pre-seasoned treat.
Jingle bells is the way to go.