Fog is a giant softbox. It removes shadows, hides clutter and turns every distant ridge into a paler version of the one in front of it. That is the appeal, and also the trap: a meter sees all that brightness and underexposes.
What has worked for me is opening up a stop to a stop and a half from what the meter suggests, and always putting something dark and close in the frame — a fence post, a cypress, a person — so the eye has an anchor before it drifts into the grey.
Mornings are better than afternoons. The fog tends to lift from the bottom, and for about twenty minutes the near ground is clear while everything past it is still gone.