Done loads of camping all around Europe over the past 2 years, this was one of the most basic sites we stayed at (not considering the very south of Europe like Italy or South of France which cost a fraction of Mosvangen though). Never seen a cabin without running water or toilet. 60NOK extra for the kitchen which is an electric 2 hob cooker and a fridge. Borrowed a pot from reception to make some tea. No cutlery, no plates, no cups etc provided, don't think 60NOK is very reasonable. Only one shower/wc block - at the opposite end of the campsite so you really think twice whether you get up during the night. 4 bed cabin has 2 bunk beds in the room at the back, and a tiny table with 4 folding chairs, fridge, bench with cooker and big couch in the front room. Would have rather had a double bed or bigger dining table (which fits 3 people at the max.) instead of the couch. Camping for us is about a place to sleep, cook and eat, couch is probably meant as a treat but seemed a waste of space/wrong priorities.
Girl at the reception was very nice as was the email contact we had prior to booking and arrival.