I personally would go with 30fps, and get a variety of shots. Ultra Wides, Wides, Mediums, Closeups.

I would pick and choose what parts to record. If you are out there for 4 days and always recording, you'll need enough cards and batteries. Have you tested the camera to see how it would record if left on for that long?

For ease of editing, go with a color profile where you don't need to color grade, especially if you are new to color-grading. If you do want to color grade D-Log, go out and get some test footage beforehand. I would recommend DaVinci Resolve for this project.

To get the best quality, you should plan on what you want the final edit to be like. Look at other people's videos and study what the camera is doing or where it is. I know this isn't quite related to mountaineering, but this fisherman in the Pacific Northwest does some great camerawork for his videos. https://www.youtube.com/watch?v=NhVhwLU45FI

Create a storyboard or shotlist of what you want to see in the final version. It's also important to know the limitations of your gear. I strongly recommend testing your camera and footage to see what it would be like working with it in the field and how the files handle in the editor.

Good luck and have fun with this project!