What settings to use in camera?
I almost always shoot in Aperture Priority, the best landscape photographers in the world shoot in Aperture priority so don't go screwing around with Manual. The only time I use manual is when the sun is down and I am making long exposures, greater than 30 seconds.
I almost always use an f-stop of 20 or 22: it will give you great depth of field, people will tell you about diffraction at those apertures, and it can happen, but you have to test your lens..if it happens, then use 16 or 18, my 17-40 mm F/4 is excellent at f/22, it is my favorite aperture.
ISO needs to be 100 or 200, whatever is the native lowest ISO for your camera, you definitely don't want noise.
Let your camera set the shutter speed based upon your f-stop and ISO.
You have all the stuff, you feel adept with the filters; but when do you shoot?
The Golden hour:
- an hour before sunrise and an hour after
- an hour before sunset and an hour after or longer
These are the times of day when the sun is low and the blue wavelengths do not penetrate the sky, thus, the sky becomes magic with amazing color.