Do you have any advice for potential travellers?
Be as fit as you can before you go, you'll have much more fun if you aren't huffing and puffing. Also be honest about what you can and can't do, but throw yourself in. I was useless first time but comfortable in the grade 2 group second time even though I really struggled throughout last time.
Be prepared to be gregarious - you may be sharing a room with 3 total strangers in close (though comfortable) quarters, and the showers are communal too.
Kvitavatn is very quiet so not the place to go if you are looking for a lot of nightlife, but the skiing both in tracks and off track is brilliant.