[Hopper]

Hey Fellow Fly fishers,
I just got the latest subscription of Fly Fusion in the mail(A fantastic Christmas gift from my wife, I hope I have been a good boy this year and get another) And they have a great article on Winter Bull trout. I have fished for Steelhead in winter, and will be heading down to Northern Cal next month for another go, but have not hooked into any Bulls in winter.
Any suggestions/stories on great winter Bull fishing? Have you been? I know parts of the Crow are open yearly, but haven't had luck with Bull trout there, only feisty Cutts.
I haven't done research on it yet, the article got me excited, and turned here for research first!