What a gorgeous country! And great pics as well... thanks, Semmern.
Did you navigate using the GPS or with more traditional equipment - VOR, NDB - as well?
I try to use the GPS as little as possible. You never know when it drops out on you. Case in point, just over a week ago a guy from my club got lost in bad weather, and the light rapidly fading. He had to be guided down by a police helicopter in IMC, to a small airport, after having flown around for three hours. Fortunately he had more than enough fuel, but it was a close call. His GPS suddenly stopped working...
I used a couple of VORs, but other than that I navigated using the old Mk.1 eyeball, a stop watch, and maps. I see GPS in GA planes as a convenience sometimes, to use if you're flying a short trip over terrain you know well. It is NOT a primary nav aid in small planes, and a lot of people tend to forget that.
It does get hard to navigate here from time to time. Like RsCol says, a lot of similar-looking lakes and lots of forest. Still, once you get the hang of it, it's not that bad.
For this trip I used things like a big lake, a small town and a road as landmarks. The fjords in western Norway mostly run in easterly directions, so you naturally end up following one of those both on the way west and back east. Then there's the glacier

And I know most of southern Norway from having driven around a lot, and I recognise a lot of places from the air.