In reply to idiotproof (Buxton MC):
Had an amazing 2 week trip this year organised by Ski Safari - best ski trip I've ever had (and done around 50). Got some good advice on here and started to write up a trip report - will see if I can dig it out.
Went to Panorama, Revelstoke, kicking horse and Banff (one day at Sunshine, one day at lake Louise). I can understand why John W was unimpressed with the latter, the bus rides are a pain, but the other 3 resorts were ski-in, ski-out.
But the skiing in all four was brilliant, particularly if you like venturing off-piste without a guide. I say off-piste, but everything we did was in-bounds and patrolled - and fantastic steep powder runs, mostly amidst well spaced trees. Quite enjoyed the pistes too, generally quiet, but not worth going all that way for. And my advice would be to go for at least 10 days, go to at least two resorts and give yourself a rest day on the Saturday - the one day we encountered long queues - most days none at all.