We are back now from a highly enjoyable ski trip to Myoko. Everything went really well. My only piece of feedback for new travellers is to take the phone number for the Myoko tourist office with them (they have english speakers).
We got stuck in Nagano because the trains were not running to Myoko because of heavy snow. I placed a call to the Myoko tourist office from Nagano and they were able to advise me to get on the train to Kurohime (most of the way to Myoko) and from there they had arranged for the Hotel Alp owners and other tourist office staff to drive new arrivals to their accommodation. Fantastic, otherwise we were stuck in Nagano instead of skiing. Taxis were very hard to get because of the snow conditions and demand.
thanks and regards