A large turkey, with dressing and gravy, carved at the destination so it stays warm.
A large ham with your favourite glaze, sliced when you get there.
Chili con carne with garlic bread or served on rice. Keep the chili warm in a crockpot/slow cooker.
Pulled pork with buns. Coleslaw on the side or, even better, on the sandwich. (I have a recipe that we slow-cook in the oven, as opposed to on the BBQ smoker.)
Greek souvlaki, cooked either indoors or outdoors.
Ceili said chicken wings. Buffalo wings are easy to do. You don't have to deep-fry them.