How about sausage and peppers? Or pulled pork with sauce? You can make both ahead, leave them in large foil baking pans (like for roasting turkey) and then just place it on the grill, stirring it every so often. Have a nice assortment of rolls and breads available.
It's the remnants of Ernesto here, so it's damp and chilly. I'd consider large pots of mulled cider and cake donuts, as well.
I always enjoyed the tailgating part ever so much more than the actual game part if football was involved.