sounds intriguing. guess that makes it "docs imperial strong belgian vanilla bourbon porter". what a mouthfull.
im thinking some of the flavors may get lost in translation. but may also be one hell of a tasty beer.
I have done a stout with a belgian yeast, and the results were mixed. Probably not something I would do again, but maybe if I had the time to tweak the recipe out and refine it. Taylor it to the flavors of the yeast. I'd be interested in hearing how that comes out!