Birna, Fons, Akira, Armando: thanks for the kind remarks!
Bent: "why not a non converted camera?" A reasonable question, indeed. I have two answers.
(1) My initial reasoning was, well, we will walk predominantly during daytime, and from experience, I know this is not the best time for landscape photography in the summer. On the other hand, these conditions are less of a problem for IR-camera's, so, let's go for this avenue.
(2) a week before departure, I reconsiderd and decided it woud be better to take one converted camera (the d5300 with a 550nm conversion, combined with a hoya r72 filter to have more options) and a non converted camera. But I did not have a nonconverted camera with a cropped sensor, and taking a full frame body was not really an option (heavier, different lenses, different batteries,...), and therefore I bought a cheap d3400 on the internet. But alas, this camera arrived during the day I departed early in the morning for Bergen, so I missed it.