What light color did your camera record the shots at? Early morning light is quite blue, but AWB can sometimes be off the mark.
Most landscape photographers will use a natural daylight setting (around 5000-5500k) instead of AWB. That way the scene is captured as it was, without any color correcting.
Keep in mind that the color of light is constantly changing. By sticking with a consistant WB setting on your camera, you will be recording the changes as they occur without your camera trying to compensate for it.
Also, our eyes do a sort of color-correcting that we sometimes have to work against while photographing. Especially if you're referencing off of your LCD as you shoot.
Capturing RAW of course allows you to change your WB in PP if you're not happy with the results.
You're correct in overexposing a bit - just reference your histogram to make sure you're retaining your highlights while exposing to the right.