I would add Engelberg to Fraser’s list above and make it 12 expert destinations.
But I would agree with his take that Val d’Isere is #1.
1) Snow reliability if booking in advance.
2) Once you have been guided a couple of days you can navigate fairly easily on your own assuming favorable snow stability.
I agree about Zermatt too but I’d be careful about advance booking if off piste is a priority, as it’s very rocky and needs a lot of coverage. But if you get it right we found Zermatt as non competitive for powder as typical intermediate areas in the Alps.
				
			But I would agree with his take that Val d’Isere is #1.
1) Snow reliability if booking in advance.
2) Once you have been guided a couple of days you can navigate fairly easily on your own assuming favorable snow stability.
I agree about Zermatt too but I’d be careful about advance booking if off piste is a priority, as it’s very rocky and needs a lot of coverage. But if you get it right we found Zermatt as non competitive for powder as typical intermediate areas in the Alps.
			
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