If it's anything involving color extremes (fall foliage, sunrise/sunsets), I NEVER shoot in AWB. The way this was explained to me when I went from film/negatives to digital oh so long ago is that what AWB does is to seek to "balance" the colors and remove the extremes. It takes that saturated sunset you're aiming at and reduces the colors. So it will tone down the red and add more blue. Effectively it sabotages your effort to capture the saturated reds and oranges and yellows.
I typically shoot either in "cloudy" or "daylight" or a custom setting. And yes, I also shoot in RAW.