Haha that's great, albeit a little weird. I've never used pecan but I've read that just like Mesquite it can be a little intense if it's the only wood.
Edit, for my own curiosity and not wanting to be a complete idiot, I did some reading. It seems people do smoke with pecan and even some famous barbecue chains and competition barbecuers. I read somewhere that it was a species of Hickory and tasted similar. I don't know if that is true but for some reason I just don't think Hickory and pecan will mix very well together. I do think Oak and pecan will. As I was reading different people's opinions, someone really knowledgeable mentioned that taste is subjective and to smoke with it is the only way to really know what you like. And then blend it with other things and see how that goes. I would think pecan and apple would go together and I'm sure some people like pecan and Cherry but that doesn't seem right to me. If pecan truly does have a delicate sweet flavor then almost any wood would probably drown that out. Hope you tell us how it turns out.
By the way has anyone mixed cherry and mesquite? Another combination I would like to try is oak and apple?