Point 5:

 

Some Further Notes on Time and Space

 

If you choose to relate a "journey" that takes place within a limited period of time, your narration/description will probably evolve consistently, from beginning to end. However, if you choose to relate a "journey" that takes place over a longer period of time (or space), your narration/description may need to be episodic in order to remain specific and concrete. Either approach is fine.