It seems pretty clear from this photo that everything was visible. There were definitely some difficult aspects of the journey.
The truth is, the LEM was largely computer controlled. Humans helped in the landing spot selection, and could adjust the aimpoint, but that was really all they were doing. There were some adjustments made by virtue of some written numbers that might have been illegible in flight, but they could get used to the numbers in training and adjust, even if they couldn't read the number. Essentially the windows had numbers in them to program into the computer to adjust the landing site.
You might read "Digital Apollo: Human and Machine in Spaceflight", which is where I learned how this works.