Salt for the cooking chemistry but no pepper. Cooked over an open fire the meat brings its own flavor to the party (condolences to Alton).
My wife would take you in 2 out of 3 falls on the pepper, especially here in Texas.
I use a bit of garlic-minced or powder-and some fresh-ground black pepper, but nothing else.
Now I’m jonesin’ for steak but I don’t have one, and I’ve already thawed chicken legs to grill for dinner...