You'll get all the help you need with the grain bill, but when it comes to doing something this crazy you're just gonna have to DO IT!
I agree that you want to cut back significantly on the rauch malt, and I'd say leave out the peated malt. I don't think the peated flavor translates to BBQ.
I'm just going to predict that you never make this beer... I'm partly saying this to spur you on and prove me wrong!