We are having our reception at a hall with the use of their large kitchen. We're having hot fried and grilled chicken as the main part. How do you suggest we keep that hot? Keeping it in the aluminum pans in the ovens at a low temp? Those sterno things? And one side will be canned sweet corn, which will be put into metal/aluminum pans. How should we heat that up? In the oven? What temp? Thanks for any advice!