In reply to James Jackson:
I would recommend you don't go to Aviemore. There is a lot more snow at Glen Coe and please bear in mind that it's mid april now.
I was skiing on Cairn Gorm yesterday (Lurcher's Gully) and personally I wouldn't make the long journey from down south to ski on Cairn Gorm. You will have more fun at Glen Coe I think.