I spent a few days pottering on the Hardangervidda last July based in Finse. As mentioned above it was still under heavy (but melting fast) snow. So couldn't do the walking I'd planned but ambled around leisurely between the hut and the glacier. The hut at Finse is fantastic. Has a microbrewery . Finse is easy to reach on the train from Bergen. You can book your tickets online from here in advance easily and cheaply. In fact the whole trip was very easy logistically. No stress apart from the unexpected snow levels.
Didn't see much of Bergen due to the rain, but the DNT office there was really helpful.
Flew hand luggage only with Norwegian using a 38l pack. As I was hitting had no need for camping/cooking kit so 38l was plenty.
Bigger/deeper patches were "nice" snow. Consolidated (so no need for snow shoes) and axe/crampons would've helped on steeper slopes, at times anyway.
It wasn't especially cold. Maybe just dipping below freezing, maybe, in the early hours. Overcast days were like 8 - 12c and it was warmer when the sun was out. I didn't use any insulation just base layer, boreas and shell. Was fine. Felt cold in the sleet though.
There were plenty of patches down to around 800m, though much patchier. When I arrived above 1000m was mostly snow, when I left this was increasingly patchy. I'll try and upload some photos when I'm home in a Week or so.
Just returned from a few days in Finse. The guy in the DNT office in Beegwn had advised against going to Finse because of the snow. I thanked him for his advice and ignored it. Perhaps stupidly. There was a LOT of snow still lying. I heard muttering a that it was the worst in a decade or even living memory. The snow meant a lot of trails weren't really "open". It also started to met, and fast, again blocking trails. At least one bridge was down .
I hadn't taken axe,crampons or poles so big snow slopes and river grossing a were out for me (though others did them).
So, discovering that the hut at Finse had a rather excellent selection of microbrewed beers from it's own brewery I hung out there and explored the valleys beneath the glacier and had a whale of a time, albeit a very gentle one !