....hmmmm...
I don't know if you lot are making me want to do this more or less!
Yes, it is 6643N, according to ProPlan. I've left the page from the Finnish AIP I was referring to at the office, but either I am dyslexic or it is wrong there...either a bit worrying!
It sounds like Kuusamo is more likely to offer reliable hangarage than Kemijarvi, which is an argument for it, but it's much further from our destination, Salla.
Anyway, still open to more information if any is available, otherwise, thank you all.
W