Here are my GPS track recordings in Google Earth (it was 45 km in total):
For navigation, I used a Samsung Note 3 with Locus Pro and OpenAndroMaps (offline map of Norway with Elevate hiking theme pack). It’s the best app I found for offline maps so far. Highly recommended. I also had a paper map and a compass with me as a backup but didn’t use them very often. The GPS tracking would drain the battery within a couple of hours so I used my good old Garmin Forerunner 310 for this. This four years old and touch screen free (great!) fitness watch still has a battery life of 12-14 hours.
I also took a GoPro with me and took short videos occasionally. Here is complete video: