In reply to jlp:
Not sure if good kit is available that easily from Stockholm...
But I'm sure you can get the needed nordic fjelltouring rig from Kiruna (and without a doubt from Abisko Turistation). That way you can cover most terrain on something that is most suited for that. And if you fancy proper skiing in the Kebnekaise massif, you can rent proper AT (or telemark) gear from Kebne Fjällstation.
After Kebne, it's a ~20 km ski to Nikkaluokta, where a daily (once a day, I think) postal buss service will get ya to Kiruna.
From Kiruna, it's about an hours trainride to Abisko (to return the skis) and then the sleeper train back to Stockholm. If the timetables are messed up, you can always do an evening of off-piste skiing on Njulla (next to Abisko Turiststation, rent proper gear from the there) or perhaps even go all the way to Riksgränsen...
I'd bring the tent, as Easter is prime ski- and fjelltouring season there, so the huts migth be fully packed.