First some notes about dynamic range.

Timelapses of sunrises or sunsets are tricky because of the huge dynamic range that you can capture. My (unscientific) tests showed me that capturing smooth gradients of the sky as well as details in the shadows would require a camera with 20 stops of dynamic range or more. This camera doesn't exist. But worse, your final video will have a displayed dynamic range of just 7 or 8 stops. You will like to compress as much input dynamic range as possible into the output, without having a flat or unnatural result. At some point you have to crush shadows for the sake of a good overall atmosphere.

These are my advises:

• Do some tests beforehand, in shooting as well as color grading.
• Try different gradings, like one prioritizing the sky, the other one the shadows. Which one looks best?
• If you cannot do this on location (because it would require travel), capture some boring-looking landscape near your home. I know, it's a sacrifice. Every bystander will question your photographic abilities, because you chose that boring landscape.
• Study the specifics of your final location. For example, the mountains might show some fog only with a specific weather condition. How will the shadows fall in the morning vs the evening?
• Shoot raw or at least with a flat picture profile.
• Do some math: How many frames would you like to capture? How many space is on your recording medium? How long does the battery last in potentially freezing cold conditions? Perhaps you have to skip the early or the late moments.
• You may also find out that different timelapse speeds result in different moods. If your available recording/battery capacity makes it possible, shoot in a slightly higher frequency than intended. You can still speed up/slow down in post production. But having only 25 or 30 frames per second available is your hard limit of slowing down.

These all are complicated considerations, where one priority often compromises the other.

You know that setting the camera up with some parameters is easy. But a good timelapse depends on your experience with the limits that you will encounter.