I generally cook by sight and make adjustments from there (I was really bad about writing things down when I was a chef) Off the top of my head, I think I would use a 1/3 to 1/2 apple per pound to start with and then adjust after that. I am thinking a spicy sausage with Granny Smith and sharp cheddar sounds great. Let us know how this story unfolds.....
Darwin, that is what I was thinking about just hoping someone had done it before. I was thinking of using around 2 cups of apples to 10 lb of brats (what do ya think?)
Bud