What I would do is find somebody who's an awesome bump skier, then go train with them for a day or two.
I know here in CO, there's a woman who's out of Winter Park, "Jan Metz", I think is her name? She's incredible. Barnes knows her.
I know another woman who used to be on the pro tour and she teaches too. She used to coach the freestyle team at Aspen.
But both are here in CO. But if you want to find someone where you live, once you start talking to the "bump pros", they should be able to refer you to someone in your area.
I know John Clendenin does bump camps. John is one of the founders of the freestyle movement. His web site is: http://www.skidoctors.com/directory1.htm