Navigation is a safety concern, so be sure to be smart and confident in your method.
It is recommended to have relevant topographical maps in hard copy on the trail at all times. Ideally, each member should have a map in case the group becomes separated, but two members should undoubtedly carry physical topographical maps.
It is unwise to rely entirely on one navigation method. Waymarking symbols can fade, go missing, or be obscured, GPS units can run out of batteries, malfunction, get wet, fall off a cliff, etc, and maps can get wet, tear, or be lost. Be confident in at least two navigation methods on the trail.
If you are not totally confident with your ability to independently navigate a trail, hiring a local guide is always an option. Local guides know the trail and terrain very well, and they can provide you with historical and cultural context as you walk, which will add depth and richness to your hiking experience.