Also, I take along some meats I don't have to cook. So I'll do some roast beef, slice it at home, then pack it in a freezer bag (often I will pack it cold as well), or I'll roast a chicken and cut it up, that sort of thing. You can also pre-cook bacon in your oven and just heat it up.
This year I want a dutch oven that I can bury in the coals. I have a friend who does rack of lamb that way when he camps. He's a professional chef, though.