Two or more cameras or backs or film holders. one for color, one for monochrome. If you want to get real fancy, 4 cameras-slow and fast for each emulsion type.
If scanning is the end product, convert to monochrome in the computer.
Digi solves all the problems, tungsten, sunlight, fast, slow, mono, color, grad filters, high or low contrast, it does everything.
I carry a Nikon D700 for color and a camera for monochrome film, Leica if I have energy and a Nikon if not because I can use the same lenses.